chore(package): update cross-env to version 5.0.1

Closes #9

Author: greenkeeper[bot]

package.json

@@ -25,7 +25,7 @@
     "@types/redux-actions": "^1.2.3",
     "@types/redux-logger": "^3.0.0",
     "awesome-typescript-loader": "^3.1.2",
-    "cross-env": "4.0.0",
+    "cross-env": "5.0.1",
     "enzyme": "^2.8.2",
     "extract-text-webpack-plugin": "2.1.0",
     "html-webpack-plugin": "2.28.0",