Merge pull request #472 from halfzebra/renovate/mocha-8.x

chore(package.json): Update dependency mocha to v8

Author: renovate[bot]

package.json

@@ -79,7 +79,7 @@
     "eslint-plugin-prettier": "3.1.4",
     "husky": "4.3.0",
     "lint-staged": "10.4.0",
-    "mocha": "7.2.0",
+    "mocha": "8.1.3",
     "nightmare": "3.0.2",
     "prettier": "2.1.2",
     "rimraf": "3.0.2",