Use last version of mocha that supports node 0.x

Author: am11

package.json

@@ -76,7 +76,7 @@
     "eslint": "^3.4.0",
     "fs-extra": "^0.30.0",
     "istanbul": "^0.4.2",
-    "mocha": "^5.2.0",
+    "mocha": "^3.5.3",
     "mocha-lcov-reporter": "^1.3.0",
     "object-merge": "^2.5.1",
     "read-yaml": "^1.0.0",