chore(package): update mocha to version 7.0.1

Closes #58

Author: greenkeeper[bot]

package.json

@@ -41,7 +41,7 @@
     "eslint-plugin-node": "^8.0.0",
     "eslint-plugin-promise": "^4.0.1",
     "eslint-plugin-standard": "^4.0.0",
-    "mocha": "^5.2.0",
+    "mocha": "^7.0.1",
     "mocha-eslint": "^5.0.0",
     "uglifyjs-webpack-plugin": "^2.0.1",
     "webpack": "^4.28.1",