- Added TypeScript definitions.

- Changed throw error if update after finalize

tests/test.js

@@ -264,7 +264,7 @@
         call: function (message) {
           var hash = algorithm.update(message);
           hash.hex();
-          hash.update(message);
+          hash.finalize();
           return hash.hex();
         }
       }
@@ -321,6 +321,16 @@
             });
           });
         });
+
+        context('when update after finalize', function () {
+          it('should throw error', function () {
+            expect(function () {
+              var hash = algorithm.update('any');
+              hash.hex();
+              hash.update('any');
+            }).to.throwError(/finalize already called/);
+          });
+        });
       });
     });
   }