[fixed] Add missing envify npm dependency. Closes #193 (#194)

Author: danielsiwiec

package.json

@@ -25,6 +25,7 @@
     "babel-loader": "^6.2.4",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-react": "^6.5.0",
+    "envify": "^3.4.1",
     "expect": "1.10.0",
     "karma": "^0.13.22",
     "karma-browserify": "^4.2.1",