Update Dev Dependencies

Author: ericf

package.json

@@ -33,13 +33,13 @@
     "expect.js": "^0.3.1",
     "grunt": "^0.4.5",
     "grunt-benchmark": "^0.3.0",
-    "grunt-bundle-jsnext-lib": "^0.2.1",
+    "grunt-bundle-jsnext-lib": "^0.4.1",
     "grunt-cli": "^0.1.13",
     "grunt-contrib-clean": "^0.6.0",
-    "grunt-contrib-copy": "^0.6.0",
+    "grunt-contrib-copy": "^0.7.0",
     "grunt-peg": "^1.5.0",
     "istanbul": "^0.3.2",
-    "mocha": "^1.21.4",
+    "mocha": "^2.0.1",
     "xunit-file": "0.0.5"
   }
 }