Merge pull request #145 from declandewet/greenkeeper/cross-env-5.1.5

Update cross-env to the latest version 🚀

Author: fatfisz

package.json

@@ -27,7 +27,7 @@
     "babel-preset-env": "^1.6.1",
     "babel-register": "^6.26.0",
     "codecov": "^3.0.0",
-    "cross-env": "5.1.4",
+    "cross-env": "5.1.5",
     "doctoc": "^1.3.0",
     "eslint": "^4.15.0",
     "eslint-config-prettier": "^2.9.0",