chore(package): update eslint-plugin-mocha to version 6.1.0

Closes #30

Author: greenkeeper[bot]

package.json

@@ -57,7 +57,7 @@
     "eslint-config-airbnb": "16.1.0",
     "eslint-plugin-import": "^2.7.0",
     "eslint-plugin-jsx-a11y": "6.0.3",
-    "eslint-plugin-mocha": "^5.0.0",
+    "eslint-plugin-mocha": "^6.1.0",
     "eslint-plugin-react": "^7.3.0",
     "jest": "^23.0.0",
     "package-self": "^1.1.1",