chore(package): update mocha to version 7.1.2

Closes #113

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "eslint-plugin-react": "^7.4.0",
     "hanson": "^1.1.1",
     "hson-loader": "^2.0.0",
-    "mocha": "^4.0.1",
+    "mocha": "^7.1.2",
     "node-sass": "^4.3.0",
     "rimraf": "^2.5.2",
     "should": "^13.1.2",