diff --git a/package-lock.json b/package-lock.json
index 55784f1..89b655a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,9 @@
 {
   "name": "js-sha256",
-  "version": "0.8.0",
+  "version": "0.9.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
-    "bindings": {
-      "version": "1.3.0",
-      "resolved": "https://registry.npmjs.org/bindings/-/bindings-1.3.0.tgz",
-      "integrity": "sha512-DpLh5EzMR2kzvX1KIlVC0VkC3iZtHKTgdtZ0a3pglBZdaQFjt5S9g9xd1lE+YvXyfd6mtCeRnrUfOLYiTMlNSw==",
-      "dev": true
-    },
     "commander": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/commander/-/commander-2.3.0.tgz",
@@ -40,9 +34,9 @@
       "integrity": "sha1-4xPusknHr/qlxHUoaw4RW1mDlGc=",
       "dev": true,
       "requires": {
-        "graceful-fs": "2.0.3",
-        "inherits": "2.0.3",
-        "minimatch": "0.2.14"
+        "graceful-fs": "~2.0.0",
+        "inherits": "2",
+        "minimatch": "~0.2.11"
       }
     },
     "graceful-fs": {
@@ -99,8 +93,8 @@
       "integrity": "sha1-x054BXT2PG+aCQ6Q775u9TpqdWo=",
       "dev": true,
       "requires": {
-        "lru-cache": "2.7.3",
-        "sigmund": "1.0.1"
+        "lru-cache": "2",
+        "sigmund": "~1.0.0"
       }
     },
     "minimist": {
@@ -152,55 +146,50 @@
         }
       }
     },
-    "nan": {
-      "version": "2.8.0",
-      "resolved": "https://registry.npmjs.org/nan/-/nan-2.8.0.tgz",
-      "integrity": "sha1-7XFfP+neArV6XmJS2QqWZ14fCFo=",
-      "dev": true
-    },
     "nyc": {
       "version": "11.3.0",
       "resolved": "https://registry.npmjs.org/nyc/-/nyc-11.3.0.tgz",
       "integrity": "sha512-oUu0WHt1k/JMIODvAYXX6C50Mupw2GO34P/Jdg2ty9xrLufBthHiKR2gf08aF+9S0abW1fl24R7iKRBXzibZmg==",
       "dev": true,
       "requires": {
-        "archy": "1.0.0",
-        "arrify": "1.0.1",
-        "caching-transform": "1.0.1",
-        "convert-source-map": "1.5.0",
-        "debug-log": "1.0.1",
-        "default-require-extensions": "1.0.0",
-        "find-cache-dir": "0.1.1",
-        "find-up": "2.1.0",
-        "foreground-child": "1.5.6",
-        "glob": "7.1.2",
-        "istanbul-lib-coverage": "1.1.1",
-        "istanbul-lib-hook": "1.1.0",
-        "istanbul-lib-instrument": "1.9.1",
-        "istanbul-lib-report": "1.1.2",
-        "istanbul-lib-source-maps": "1.2.2",
-        "istanbul-reports": "1.1.3",
-        "md5-hex": "1.3.0",
-        "merge-source-map": "1.0.4",
-        "micromatch": "2.3.11",
-        "mkdirp": "0.5.1",
-        "resolve-from": "2.0.0",
-        "rimraf": "2.6.2",
-        "signal-exit": "3.0.2",
-        "spawn-wrap": "1.3.8",
-        "test-exclude": "4.1.1",
-        "yargs": "10.0.3",
-        "yargs-parser": "8.0.0"
+        "archy": "^1.0.0",
+        "arrify": "^1.0.1",
+        "caching-transform": "^1.0.0",
+        "convert-source-map": "^1.3.0",
+        "debug-log": "^1.0.1",
+        "default-require-extensions": "^1.0.0",
+        "find-cache-dir": "^0.1.1",
+        "find-up": "^2.1.0",
+        "foreground-child": "^1.5.3",
+        "glob": "^7.0.6",
+        "istanbul-lib-coverage": "^1.1.1",
+        "istanbul-lib-hook": "^1.1.0",
+        "istanbul-lib-instrument": "^1.9.1",
+        "istanbul-lib-report": "^1.1.2",
+        "istanbul-lib-source-maps": "^1.2.2",
+        "istanbul-reports": "^1.1.3",
+        "md5-hex": "^1.2.0",
+        "merge-source-map": "^1.0.2",
+        "micromatch": "^2.3.11",
+        "mkdirp": "^0.5.0",
+        "resolve-from": "^2.0.0",
+        "rimraf": "^2.5.4",
+        "signal-exit": "^3.0.1",
+        "spawn-wrap": "=1.3.8",
+        "test-exclude": "^4.1.1",
+        "yargs": "^10.0.3",
+        "yargs-parser": "^8.0.0"
       },
       "dependencies": {
         "align-text": {
           "version": "0.1.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
-            "kind-of": "3.2.2",
-            "longest": "1.0.1",
-            "repeat-string": "1.6.1"
+            "kind-of": "^3.0.2",
+            "longest": "^1.0.1",
+            "repeat-string": "^1.5.2"
           }
         },
         "amdefine": {
@@ -223,7 +212,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "default-require-extensions": "1.0.0"
+            "default-require-extensions": "^1.0.0"
           }
         },
         "archy": {
@@ -236,7 +225,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "arr-flatten": "1.1.0"
+            "arr-flatten": "^1.0.1"
           }
         },
         "arr-flatten": {
@@ -264,9 +253,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "chalk": "1.1.3",
-            "esutils": "2.0.2",
-            "js-tokens": "3.0.2"
+            "chalk": "^1.1.3",
+            "esutils": "^2.0.2",
+            "js-tokens": "^3.0.2"
           }
         },
         "babel-generator": {
@@ -274,14 +263,14 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-messages": "6.23.0",
-            "babel-runtime": "6.26.0",
-            "babel-types": "6.26.0",
-            "detect-indent": "4.0.0",
-            "jsesc": "1.3.0",
-            "lodash": "4.17.4",
-            "source-map": "0.5.7",
-            "trim-right": "1.0.1"
+            "babel-messages": "^6.23.0",
+            "babel-runtime": "^6.26.0",
+            "babel-types": "^6.26.0",
+            "detect-indent": "^4.0.0",
+            "jsesc": "^1.3.0",
+            "lodash": "^4.17.4",
+            "source-map": "^0.5.6",
+            "trim-right": "^1.0.1"
           }
         },
         "babel-messages": {
@@ -289,7 +278,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-runtime": "6.26.0"
+            "babel-runtime": "^6.22.0"
           }
         },
         "babel-runtime": {
@@ -297,8 +286,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "core-js": "2.5.1",
-            "regenerator-runtime": "0.11.0"
+            "core-js": "^2.4.0",
+            "regenerator-runtime": "^0.11.0"
           }
         },
         "babel-template": {
@@ -306,11 +295,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-runtime": "6.26.0",
-            "babel-traverse": "6.26.0",
-            "babel-types": "6.26.0",
-            "babylon": "6.18.0",
-            "lodash": "4.17.4"
+            "babel-runtime": "^6.26.0",
+            "babel-traverse": "^6.26.0",
+            "babel-types": "^6.26.0",
+            "babylon": "^6.18.0",
+            "lodash": "^4.17.4"
           }
         },
         "babel-traverse": {
@@ -318,15 +307,15 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-code-frame": "6.26.0",
-            "babel-messages": "6.23.0",
-            "babel-runtime": "6.26.0",
-            "babel-types": "6.26.0",
-            "babylon": "6.18.0",
-            "debug": "2.6.9",
-            "globals": "9.18.0",
-            "invariant": "2.2.2",
-            "lodash": "4.17.4"
+            "babel-code-frame": "^6.26.0",
+            "babel-messages": "^6.23.0",
+            "babel-runtime": "^6.26.0",
+            "babel-types": "^6.26.0",
+            "babylon": "^6.18.0",
+            "debug": "^2.6.8",
+            "globals": "^9.18.0",
+            "invariant": "^2.2.2",
+            "lodash": "^4.17.4"
           }
         },
         "babel-types": {
@@ -334,10 +323,10 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-runtime": "6.26.0",
-            "esutils": "2.0.2",
-            "lodash": "4.17.4",
-            "to-fast-properties": "1.0.3"
+            "babel-runtime": "^6.26.0",
+            "esutils": "^2.0.2",
+            "lodash": "^4.17.4",
+            "to-fast-properties": "^1.0.3"
           }
         },
         "babylon": {
@@ -355,7 +344,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "balanced-match": "1.0.0",
+            "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
           }
         },
@@ -364,9 +353,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "expand-range": "1.8.2",
-            "preserve": "0.2.0",
-            "repeat-element": "1.1.2"
+            "expand-range": "^1.8.1",
+            "preserve": "^0.2.0",
+            "repeat-element": "^1.1.2"
           }
         },
         "builtin-modules": {
@@ -379,9 +368,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "md5-hex": "1.3.0",
-            "mkdirp": "0.5.1",
-            "write-file-atomic": "1.3.4"
+            "md5-hex": "^1.2.0",
+            "mkdirp": "^0.5.1",
+            "write-file-atomic": "^1.1.4"
           }
         },
         "camelcase": {
@@ -396,8 +385,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "align-text": "0.1.4",
-            "lazy-cache": "1.0.4"
+            "align-text": "^0.1.3",
+            "lazy-cache": "^1.0.3"
           }
         },
         "chalk": {
@@ -405,11 +394,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "ansi-styles": "2.2.1",
-            "escape-string-regexp": "1.0.5",
-            "has-ansi": "2.0.0",
-            "strip-ansi": "3.0.1",
-            "supports-color": "2.0.0"
+            "ansi-styles": "^2.2.1",
+            "escape-string-regexp": "^1.0.2",
+            "has-ansi": "^2.0.0",
+            "strip-ansi": "^3.0.0",
+            "supports-color": "^2.0.0"
           }
         },
         "cliui": {
@@ -418,8 +407,8 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "center-align": "0.1.3",
-            "right-align": "0.1.3",
+            "center-align": "^0.1.1",
+            "right-align": "^0.1.1",
             "wordwrap": "0.0.2"
           },
           "dependencies": {
@@ -461,8 +450,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "lru-cache": "4.1.1",
-            "which": "1.3.0"
+            "lru-cache": "^4.0.1",
+            "which": "^1.2.9"
           }
         },
         "debug": {
@@ -488,7 +477,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "strip-bom": "2.0.0"
+            "strip-bom": "^2.0.0"
           }
         },
         "detect-indent": {
@@ -496,7 +485,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "repeating": "2.0.1"
+            "repeating": "^2.0.0"
           }
         },
         "error-ex": {
@@ -504,7 +493,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-arrayish": "0.2.1"
+            "is-arrayish": "^0.2.1"
           }
         },
         "escape-string-regexp": {
@@ -522,13 +511,13 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "cross-spawn": "5.1.0",
-            "get-stream": "3.0.0",
-            "is-stream": "1.1.0",
-            "npm-run-path": "2.0.2",
-            "p-finally": "1.0.0",
-            "signal-exit": "3.0.2",
-            "strip-eof": "1.0.0"
+            "cross-spawn": "^5.0.1",
+            "get-stream": "^3.0.0",
+            "is-stream": "^1.1.0",
+            "npm-run-path": "^2.0.0",
+            "p-finally": "^1.0.0",
+            "signal-exit": "^3.0.0",
+            "strip-eof": "^1.0.0"
           },
           "dependencies": {
             "cross-spawn": {
@@ -536,9 +525,9 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "lru-cache": "4.1.1",
-                "shebang-command": "1.2.0",
-                "which": "1.3.0"
+                "lru-cache": "^4.0.1",
+                "shebang-command": "^1.2.0",
+                "which": "^1.2.9"
               }
             }
           }
@@ -548,7 +537,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-posix-bracket": "0.1.1"
+            "is-posix-bracket": "^0.1.0"
           }
         },
         "expand-range": {
@@ -556,7 +545,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "fill-range": "2.2.3"
+            "fill-range": "^2.1.0"
           }
         },
         "extglob": {
@@ -564,7 +553,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-extglob": "1.0.0"
+            "is-extglob": "^1.0.0"
           }
         },
         "filename-regex": {
@@ -577,11 +566,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-number": "2.1.0",
-            "isobject": "2.1.0",
-            "randomatic": "1.1.7",
-            "repeat-element": "1.1.2",
-            "repeat-string": "1.6.1"
+            "is-number": "^2.1.0",
+            "isobject": "^2.0.0",
+            "randomatic": "^1.1.3",
+            "repeat-element": "^1.1.2",
+            "repeat-string": "^1.5.2"
           }
         },
         "find-cache-dir": {
@@ -589,9 +578,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "commondir": "1.0.1",
-            "mkdirp": "0.5.1",
-            "pkg-dir": "1.0.0"
+            "commondir": "^1.0.1",
+            "mkdirp": "^0.5.1",
+            "pkg-dir": "^1.0.0"
           }
         },
         "find-up": {
@@ -599,7 +588,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "locate-path": "2.0.0"
+            "locate-path": "^2.0.0"
           }
         },
         "for-in": {
@@ -612,7 +601,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "for-in": "1.0.2"
+            "for-in": "^1.0.1"
           }
         },
         "foreground-child": {
@@ -620,8 +609,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "cross-spawn": "4.0.2",
-            "signal-exit": "3.0.2"
+            "cross-spawn": "^4",
+            "signal-exit": "^3.0.0"
           }
         },
         "fs.realpath": {
@@ -644,12 +633,12 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "fs.realpath": "1.0.0",
-            "inflight": "1.0.6",
-            "inherits": "2.0.3",
-            "minimatch": "3.0.4",
-            "once": "1.4.0",
-            "path-is-absolute": "1.0.1"
+            "fs.realpath": "^1.0.0",
+            "inflight": "^1.0.4",
+            "inherits": "2",
+            "minimatch": "^3.0.4",
+            "once": "^1.3.0",
+            "path-is-absolute": "^1.0.0"
           }
         },
         "glob-base": {
@@ -657,8 +646,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "glob-parent": "2.0.0",
-            "is-glob": "2.0.1"
+            "glob-parent": "^2.0.0",
+            "is-glob": "^2.0.0"
           }
         },
         "glob-parent": {
@@ -666,7 +655,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-glob": "2.0.1"
+            "is-glob": "^2.0.0"
           }
         },
         "globals": {
@@ -684,10 +673,10 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "async": "1.5.2",
-            "optimist": "0.6.1",
-            "source-map": "0.4.4",
-            "uglify-js": "2.8.29"
+            "async": "^1.4.0",
+            "optimist": "^0.6.1",
+            "source-map": "^0.4.4",
+            "uglify-js": "^2.6"
           },
           "dependencies": {
             "source-map": {
@@ -695,7 +684,7 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "amdefine": "1.0.1"
+                "amdefine": ">=0.0.4"
               }
             }
           }
@@ -705,7 +694,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "ansi-regex": "2.1.1"
+            "ansi-regex": "^2.0.0"
           }
         },
         "has-flag": {
@@ -728,8 +717,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "once": "1.4.0",
-            "wrappy": "1.0.2"
+            "once": "^1.3.0",
+            "wrappy": "1"
           }
         },
         "inherits": {
@@ -742,7 +731,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "loose-envify": "1.3.1"
+            "loose-envify": "^1.0.0"
           }
         },
         "invert-kv": {
@@ -765,7 +754,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "builtin-modules": "1.1.1"
+            "builtin-modules": "^1.0.0"
           }
         },
         "is-dotfile": {
@@ -778,7 +767,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-primitive": "2.0.0"
+            "is-primitive": "^2.0.0"
           }
         },
         "is-extendable": {
@@ -796,7 +785,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "number-is-nan": "1.0.1"
+            "number-is-nan": "^1.0.0"
           }
         },
         "is-fullwidth-code-point": {
@@ -804,7 +793,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "number-is-nan": "1.0.1"
+            "number-is-nan": "^1.0.0"
           }
         },
         "is-glob": {
@@ -812,7 +801,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-extglob": "1.0.0"
+            "is-extglob": "^1.0.0"
           }
         },
         "is-number": {
@@ -820,7 +809,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "kind-of": "3.2.2"
+            "kind-of": "^3.0.2"
           }
         },
         "is-posix-bracket": {
@@ -871,7 +860,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "append-transform": "0.4.0"
+            "append-transform": "^0.4.0"
           }
         },
         "istanbul-lib-instrument": {
@@ -879,13 +868,13 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "babel-generator": "6.26.0",
-            "babel-template": "6.26.0",
-            "babel-traverse": "6.26.0",
-            "babel-types": "6.26.0",
-            "babylon": "6.18.0",
-            "istanbul-lib-coverage": "1.1.1",
-            "semver": "5.4.1"
+            "babel-generator": "^6.18.0",
+            "babel-template": "^6.16.0",
+            "babel-traverse": "^6.18.0",
+            "babel-types": "^6.18.0",
+            "babylon": "^6.18.0",
+            "istanbul-lib-coverage": "^1.1.1",
+            "semver": "^5.3.0"
           }
         },
         "istanbul-lib-report": {
@@ -893,10 +882,10 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "istanbul-lib-coverage": "1.1.1",
-            "mkdirp": "0.5.1",
-            "path-parse": "1.0.5",
-            "supports-color": "3.2.3"
+            "istanbul-lib-coverage": "^1.1.1",
+            "mkdirp": "^0.5.1",
+            "path-parse": "^1.0.5",
+            "supports-color": "^3.1.2"
           },
           "dependencies": {
             "supports-color": {
@@ -904,7 +893,7 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "has-flag": "1.0.0"
+                "has-flag": "^1.0.0"
               }
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@@ -914,11 +903,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "debug": "3.1.0",
-            "istanbul-lib-coverage": "1.1.1",
-            "mkdirp": "0.5.1",
-            "rimraf": "2.6.2",
-            "source-map": "0.5.7"
+            "debug": "^3.1.0",
+            "istanbul-lib-coverage": "^1.1.1",
+            "mkdirp": "^0.5.1",
+            "rimraf": "^2.6.1",
+            "source-map": "^0.5.3"
           },
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             "debug": {
@@ -936,7 +925,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "handlebars": "4.0.11"
+            "handlebars": "^4.0.3"
           }
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         "js-tokens": {
@@ -954,7 +943,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-buffer": "1.1.5"
+            "is-buffer": "^1.1.5"
           }
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         "lazy-cache": {
@@ -968,7 +957,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "invert-kv": "1.0.0"
+            "invert-kv": "^1.0.0"
           }
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         "load-json-file": {
@@ -976,11 +965,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "graceful-fs": "4.1.11",
-            "parse-json": "2.2.0",
-            "pify": "2.3.0",
-            "pinkie-promise": "2.0.1",
-            "strip-bom": "2.0.0"
+            "graceful-fs": "^4.1.2",
+            "parse-json": "^2.2.0",
+            "pify": "^2.0.0",
+            "pinkie-promise": "^2.0.0",
+            "strip-bom": "^2.0.0"
           }
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@@ -988,8 +977,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "p-locate": "2.0.0",
-            "path-exists": "3.0.0"
+            "p-locate": "^2.0.0",
+            "path-exists": "^3.0.0"
           },
           "dependencies": {
             "path-exists": {
@@ -1007,14 +996,15 @@
         "longest": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "loose-envify": {
           "version": "1.3.1",
           "bundled": true,
           "dev": true,
           "requires": {
-            "js-tokens": "3.0.2"
+            "js-tokens": "^3.0.0"
           }
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         "lru-cache": {
@@ -1022,8 +1012,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "pseudomap": "1.0.2",
-            "yallist": "2.1.2"
+            "pseudomap": "^1.0.2",
+            "yallist": "^2.1.2"
           }
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         "md5-hex": {
@@ -1031,7 +1021,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "md5-o-matic": "0.1.1"
+            "md5-o-matic": "^0.1.1"
           }
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         "md5-o-matic": {
@@ -1044,7 +1034,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "mimic-fn": "1.1.0"
+            "mimic-fn": "^1.0.0"
           }
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         "merge-source-map": {
@@ -1052,7 +1042,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "source-map": "0.5.7"
+            "source-map": "^0.5.6"
           }
         },
         "micromatch": {
@@ -1060,19 +1050,19 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "arr-diff": "2.0.0",
-            "array-unique": "0.2.1",
-            "braces": "1.8.5",
-            "expand-brackets": "0.1.5",
-            "extglob": "0.3.2",
-            "filename-regex": "2.0.1",
-            "is-extglob": "1.0.0",
-            "is-glob": "2.0.1",
-            "kind-of": "3.2.2",
-            "normalize-path": "2.1.1",
-            "object.omit": "2.0.1",
-            "parse-glob": "3.0.4",
-            "regex-cache": "0.4.4"
+            "arr-diff": "^2.0.0",
+            "array-unique": "^0.2.1",
+            "braces": "^1.8.2",
+            "expand-brackets": "^0.1.4",
+            "extglob": "^0.3.1",
+            "filename-regex": "^2.0.0",
+            "is-extglob": "^1.0.0",
+            "is-glob": "^2.0.1",
+            "kind-of": "^3.0.2",
+            "normalize-path": "^2.0.1",
+            "object.omit": "^2.0.0",
+            "parse-glob": "^3.0.4",
+            "regex-cache": "^0.4.2"
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         "mimic-fn": {
@@ -1085,7 +1075,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "brace-expansion": "1.1.8"
+            "brace-expansion": "^1.1.7"
           }
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         "minimist": {
@@ -1111,10 +1101,10 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "hosted-git-info": "2.5.0",
-            "is-builtin-module": "1.0.0",
-            "semver": "5.4.1",
-            "validate-npm-package-license": "3.0.1"
+            "hosted-git-info": "^2.1.4",
+            "is-builtin-module": "^1.0.0",
+            "semver": "2 || 3 || 4 || 5",
+            "validate-npm-package-license": "^3.0.1"
           }
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         "normalize-path": {
@@ -1122,7 +1112,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "remove-trailing-separator": "1.1.0"
+            "remove-trailing-separator": "^1.0.1"
           }
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         "npm-run-path": {
@@ -1130,7 +1120,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "path-key": "2.0.1"
+            "path-key": "^2.0.0"
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         "number-is-nan": {
@@ -1148,8 +1138,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "for-own": "0.1.5",
-            "is-extendable": "0.1.1"
+            "for-own": "^0.1.4",
+            "is-extendable": "^0.1.1"
           }
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         "once": {
@@ -1157,7 +1147,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "wrappy": "1.0.2"
+            "wrappy": "1"
           }
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         "optimist": {
@@ -1165,8 +1155,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "minimist": "0.0.8",
-            "wordwrap": "0.0.3"
+            "minimist": "~0.0.1",
+            "wordwrap": "~0.0.2"
           }
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         "os-homedir": {
@@ -1179,9 +1169,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "execa": "0.7.0",
-            "lcid": "1.0.0",
-            "mem": "1.1.0"
+            "execa": "^0.7.0",
+            "lcid": "^1.0.0",
+            "mem": "^1.1.0"
           }
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@@ -1199,7 +1189,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "p-limit": "1.1.0"
+            "p-limit": "^1.1.0"
           }
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@@ -1207,10 +1197,10 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "glob-base": "0.3.0",
-            "is-dotfile": "1.0.3",
-            "is-extglob": "1.0.0",
-            "is-glob": "2.0.1"
+            "glob-base": "^0.3.0",
+            "is-dotfile": "^1.0.0",
+            "is-extglob": "^1.0.0",
+            "is-glob": "^2.0.0"
           }
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         "parse-json": {
@@ -1218,7 +1208,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "error-ex": "1.3.1"
+            "error-ex": "^1.2.0"
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@@ -1226,7 +1216,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "pinkie-promise": "2.0.1"
+            "pinkie-promise": "^2.0.0"
           }
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         "path-is-absolute": {
@@ -1249,9 +1239,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "graceful-fs": "4.1.11",
-            "pify": "2.3.0",
-            "pinkie-promise": "2.0.1"
+            "graceful-fs": "^4.1.2",
+            "pify": "^2.0.0",
+            "pinkie-promise": "^2.0.0"
           }
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@@ -1269,7 +1259,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "pinkie": "2.0.4"
+            "pinkie": "^2.0.0"
           }
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         "pkg-dir": {
@@ -1277,7 +1267,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "find-up": "1.1.2"
+            "find-up": "^1.0.0"
           },
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             "find-up": {
@@ -1285,8 +1275,8 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "path-exists": "2.1.0",
-                "pinkie-promise": "2.0.1"
+                "path-exists": "^2.0.0",
+                "pinkie-promise": "^2.0.0"
               }
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@@ -1306,8 +1296,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-number": "3.0.0",
-            "kind-of": "4.0.0"
+            "is-number": "^3.0.0",
+            "kind-of": "^4.0.0"
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@@ -1315,7 +1305,7 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "kind-of": "3.2.2"
+                "kind-of": "^3.0.2"
               },
               "dependencies": {
                 "kind-of": {
@@ -1323,7 +1313,7 @@
                   "bundled": true,
                   "dev": true,
                   "requires": {
-                    "is-buffer": "1.1.5"
+                    "is-buffer": "^1.1.5"
                   }
                 }
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@@ -1333,7 +1323,7 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "is-buffer": "1.1.5"
+                "is-buffer": "^1.1.5"
               }
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@@ -1343,9 +1333,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "load-json-file": "1.1.0",
-            "normalize-package-data": "2.4.0",
-            "path-type": "1.1.0"
+            "load-json-file": "^1.0.0",
+            "normalize-package-data": "^2.3.2",
+            "path-type": "^1.0.0"
           }
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         "read-pkg-up": {
@@ -1353,8 +1343,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "find-up": "1.1.2",
-            "read-pkg": "1.1.0"
+            "find-up": "^1.0.0",
+            "read-pkg": "^1.0.0"
           },
           "dependencies": {
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@@ -1362,8 +1352,8 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "path-exists": "2.1.0",
-                "pinkie-promise": "2.0.1"
+                "path-exists": "^2.0.0",
+                "pinkie-promise": "^2.0.0"
               }
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@@ -1378,7 +1368,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-equal-shallow": "0.1.3"
+            "is-equal-shallow": "^0.1.3"
           }
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         "remove-trailing-separator": {
@@ -1401,7 +1391,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-finite": "1.0.2"
+            "is-finite": "^1.0.0"
           }
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         "require-directory": {
@@ -1425,7 +1415,7 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "align-text": "0.1.4"
+            "align-text": "^0.1.1"
           }
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         "rimraf": {
@@ -1433,7 +1423,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "glob": "7.1.2"
+            "glob": "^7.0.5"
           }
         },
         "semver": {
@@ -1451,7 +1441,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "shebang-regex": "1.0.0"
+            "shebang-regex": "^1.0.0"
           }
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         "shebang-regex": {
@@ -1479,12 +1469,12 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "foreground-child": "1.5.6",
-            "mkdirp": "0.5.1",
-            "os-homedir": "1.0.2",
-            "rimraf": "2.6.2",
-            "signal-exit": "3.0.2",
-            "which": "1.3.0"
+            "foreground-child": "^1.5.6",
+            "mkdirp": "^0.5.0",
+            "os-homedir": "^1.0.1",
+            "rimraf": "^2.3.3",
+            "signal-exit": "^3.0.2",
+            "which": "^1.2.4"
           }
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         "spdx-correct": {
@@ -1492,7 +1482,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "spdx-license-ids": "1.2.2"
+            "spdx-license-ids": "^1.0.2"
           }
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@@ -1510,8 +1500,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-fullwidth-code-point": "2.0.0",
-            "strip-ansi": "4.0.0"
+            "is-fullwidth-code-point": "^2.0.0",
+            "strip-ansi": "^4.0.0"
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@@ -1529,7 +1519,7 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "ansi-regex": "3.0.0"
+                "ansi-regex": "^3.0.0"
               }
             }
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@@ -1539,7 +1529,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "ansi-regex": "2.1.1"
+            "ansi-regex": "^2.0.0"
           }
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         "strip-bom": {
@@ -1547,7 +1537,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "is-utf8": "0.2.1"
+            "is-utf8": "^0.2.0"
           }
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@@ -1565,11 +1555,11 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "arrify": "1.0.1",
-            "micromatch": "2.3.11",
-            "object-assign": "4.1.1",
-            "read-pkg-up": "1.0.1",
-            "require-main-filename": "1.0.1"
+            "arrify": "^1.0.1",
+            "micromatch": "^2.3.11",
+            "object-assign": "^4.1.0",
+            "read-pkg-up": "^1.0.1",
+            "require-main-filename": "^1.0.1"
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@@ -1588,9 +1578,9 @@
           "dev": true,
           "optional": true,
           "requires": {
-            "source-map": "0.5.7",
-            "uglify-to-browserify": "1.0.2",
-            "yargs": "3.10.0"
+            "source-map": "~0.5.1",
+            "uglify-to-browserify": "~1.0.0",
+            "yargs": "~3.10.0"
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@@ -1599,9 +1589,9 @@
               "dev": true,
               "optional": true,
               "requires": {
-                "camelcase": "1.2.1",
-                "cliui": "2.1.0",
-                "decamelize": "1.2.0",
+                "camelcase": "^1.0.2",
+                "cliui": "^2.1.0",
+                "decamelize": "^1.0.0",
                 "window-size": "0.1.0"
               }
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@@ -1618,8 +1608,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "spdx-correct": "1.0.2",
-            "spdx-expression-parse": "1.0.4"
+            "spdx-correct": "~1.0.0",
+            "spdx-expression-parse": "~1.0.0"
           }
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         "which": {
@@ -1627,7 +1617,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "isexe": "2.0.0"
+            "isexe": "^2.0.0"
           }
         },
         "which-module": {
@@ -1651,8 +1641,8 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "string-width": "1.0.2",
-            "strip-ansi": "3.0.1"
+            "string-width": "^1.0.1",
+            "strip-ansi": "^3.0.1"
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@@ -1660,9 +1650,9 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "code-point-at": "1.1.0",
-                "is-fullwidth-code-point": "1.0.0",
-                "strip-ansi": "3.0.1"
+                "code-point-at": "^1.0.0",
+                "is-fullwidth-code-point": "^1.0.0",
+                "strip-ansi": "^3.0.0"
               }
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@@ -1677,9 +1667,9 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "graceful-fs": "4.1.11",
-            "imurmurhash": "0.1.4",
-            "slide": "1.1.6"
+            "graceful-fs": "^4.1.11",
+            "imurmurhash": "^0.1.4",
+            "slide": "^1.1.5"
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@@ -1697,18 +1687,18 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "cliui": "3.2.0",
-            "decamelize": "1.2.0",
-            "find-up": "2.1.0",
-            "get-caller-file": "1.0.2",
-            "os-locale": "2.1.0",
-            "require-directory": "2.1.1",
-            "require-main-filename": "1.0.1",
-            "set-blocking": "2.0.0",
-            "string-width": "2.1.1",
-            "which-module": "2.0.0",
-            "y18n": "3.2.1",
-            "yargs-parser": "8.0.0"
+            "cliui": "^3.2.0",
+            "decamelize": "^1.1.1",
+            "find-up": "^2.1.0",
+            "get-caller-file": "^1.0.1",
+            "os-locale": "^2.0.0",
+            "require-directory": "^2.1.1",
+            "require-main-filename": "^1.0.1",
+            "set-blocking": "^2.0.0",
+            "string-width": "^2.0.0",
+            "which-module": "^2.0.0",
+            "y18n": "^3.2.1",
+            "yargs-parser": "^8.0.0"
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@@ -1716,9 +1706,9 @@
               "bundled": true,
               "dev": true,
               "requires": {
-                "string-width": "1.0.2",
-                "strip-ansi": "3.0.1",
-                "wrap-ansi": "2.1.0"
+                "string-width": "^1.0.1",
+                "strip-ansi": "^3.0.1",
+                "wrap-ansi": "^2.0.0"
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@@ -1726,9 +1716,9 @@
                   "bundled": true,
                   "dev": true,
                   "requires": {
-                    "code-point-at": "1.1.0",
-                    "is-fullwidth-code-point": "1.0.0",
-                    "strip-ansi": "3.0.1"
+                    "code-point-at": "^1.0.0",
+                    "is-fullwidth-code-point": "^1.0.0",
+                    "strip-ansi": "^3.0.0"
                   }
                 }
               }
@@ -1740,7 +1730,7 @@
           "bundled": true,
           "dev": true,
           "requires": {
-            "camelcase": "4.1.0"
+            "camelcase": "^4.1.0"
           },
           "dependencies": {
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@@ -1776,8 +1766,8 @@
       "integrity": "sha512-ari2E89bD7f+fMU173NgF12JBcOhgoxeyuCs97h5K58IBENrnG9eVj2lFadrOPdqf0KifsxVmUQfzA2cHNxCZQ==",
       "dev": true,
       "requires": {
-        "commander": "2.11.0",
-        "source-map": "0.6.1"
+        "commander": "~2.11.0",
+        "source-map": "~0.6.1"
       },
       "dependencies": {
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@@ -1787,16 +1777,6 @@
           "dev": true
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-    },
-    "webworker-threads": {
-      "version": "0.7.13",
-      "resolved": "https://registry.npmjs.org/webworker-threads/-/webworker-threads-0.7.13.tgz",
-      "integrity": "sha1-yEsYtrokElu503NC5E3rgVFi+4M=",
-      "dev": true,
-      "requires": {
-        "bindings": "1.3.0",
-        "nan": "2.8.0"
-      }
     }
   }
 }
diff --git a/package.json b/package.json
index 755e4c1..b35e41a 100644
--- a/package.json
+++ b/package.json
@@ -7,8 +7,7 @@
     "expect.js": "~0.3.1",
     "mocha": "~2.3.4",
     "nyc": "^11.3.0",
-    "uglify-js": "^3.1.9",
-    "webworker-threads": "^0.7.13"
+    "uglify-js": "^3.1.9"
   },
   "scripts": {
     "test": "nyc mocha tests/node-test.js",