chore(deps): update dependency mocha to v5.1.0

Author: renovate-bot

package.json

@@ -44,7 +44,7 @@
     "is-ci": "1.0.10",
     "istanbul": "0.4.5",
     "jshint": "2.9.5",
-    "mocha": "4.0.1",
+    "mocha": "5.1.0",
     "mocha-lcov-reporter": "1.3.0",
     "mockery": "2.1.0",
     "rimraf": "2.6.2"