chore(deps-dev): bump mocha from 8.3.2 to 8.4.0

Bumps [mocha](https://github.com/mochajs/mocha) from 8.3.2 to 8.4.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](https://github.com/mochajs/mocha/compare/v8.3.2...v8.4.0)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -149,7 +149,7 @@
     "lint-staged": "=10.5.4",
     "local-web-server": "^4.2.1",
     "mini-css-extract-plugin": "^1.6.0",
-    "mocha": "=8.3.2",
+    "mocha": "=8.4.0",
     "nightwatch": "^1.6.3",
     "node-sass": "^4.14.1",
     "npm-audit-ci-wrapper": "^3.0.0",