[fixed] Move envify to dependencies

fixes jquense#308

Author: jquense

package.json

@@ -67,7 +67,8 @@
     "dom-helpers": "^2.2.4",
     "invariant": "^2.1.0",
     "uncontrollable": "^3.0.2",
-    "warning": "^2.0.0"
+    "warning": "^2.0.0",
+    "envify": "^3.0.0"
   },
   "optionalDependencies": {
     "format-number-with-string": "0.0.1",
@@ -86,7 +87,6 @@
     "cldr-data": "^28.0.3",
     "cpy": "^3.4.0",
     "css-loader": "^0.15.6",
-    "envify": "^3.0.0",
     "es5-shim": "^4.4.1",
     "eslint": "^0.24.1",
     "eslint-plugin-mocha": "^0.5.1",