chore(package): update mocha to version 4.0.1

Closes #25

Author: greenkeeper[bot]

package.json

@@ -71,7 +71,7 @@
     "immutable": "^3.8.1",
     "istanbul": "^0.4.5",
     "mindfront-redux-utils": "^1.6.0",
-    "mocha": "^3.2.0",
+    "mocha": "^4.0.1",
     "nyc": "^11.0.1",
     "pre-commit": "^1.2.2",
     "rimraf": "^2.6.1",