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

@@ -53,7 +53,7 @@
     "eslint-config-prettier": "^8.3.0",
     "eslint-plugin-import": "^2.22.1",
     "esm": "^3.2.25",
-    "mocha": "^8.3.2",
+    "mocha": "^8.4.0",
     "npm-run-all": "^4.1.5",
     "prettier": "2.2.1",
     "ts-loader": "^9.1.2",