Bump mocha from 8.1.0 to 8.4.0

Bumps [mocha](https://github.com/mochajs/mocha) from 8.1.0 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/v8.1.0...v8.4.0)

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

package.json

@@ -9,7 +9,7 @@
   "author": "Nemo <me@captnemo.in>",
   "license": "MIT",
   "devDependencies": {
-    "mocha": "^8.1.0"
+    "mocha": "^8.4.0"
   },
   "dependencies": {
     "console-log-level": "^1.4.1",