Remove eval()

Remove eval()

README.md

@@ -1,3 +1,6 @@
+MyCrypto: This is a fork of **js-sha1**.
+The **eval()** function was removed due to security concerns.
+
 # js-sha1
 [![Build Status](https://travis-ci.org/emn178/js-sha1.svg?branch=master)](https://travis-ci.org/emn178/js-sha1)
 [![Coverage Status](https://coveralls.io/repos/emn178/js-sha1/badge.svg?branch=master)](https://coveralls.io/r/emn178/js-sha1?branch=master)

src/sha1.js

@@ -49,8 +49,8 @@
   };
 
   var nodeWrap = function (method) {
-    var crypto = eval("require('crypto')");
-    var Buffer = eval("require('buffer').Buffer");
+    var crypto = require('crypto');
+    var Buffer = require('buffer').Buffer;
     var nodeMethod = function (message) {
       if (typeof message === 'string') {
         return crypto.createHash('sha1').update(message, 'utf8').digest('hex');