build(deps-dev): bump mocha from 7.2.0 to 8.4.0

Bumps [mocha](https://github.com/mochajs/mocha) from 7.2.0 to 8.4.0.
- [Release notes](https://github.com/mochajs/mocha/releases)
- [Changelog](https://github.com/mochajs/mocha/blob/master/CHANGELOG.md)
- [Commits](mochajs/mocha@v7.2.0...v8.4.0)

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

Author: dependabot[bot]

package.json

@@ -41,7 +41,7 @@
     "husky": "4.3.8",
     "lerna": "4.0.0",
     "lint-staged": "11.0.0",
-    "mocha": "7.2.0",
+    "mocha": "8.4.0",
     "npm-run-all": "4.1.5",
     "nyc": "15.1.0",
     "prettier": "2.2.1",