8.4.0 / 2021-05-07

🎉 Enhancements

• #4502: CLI file parsing errors now have error codes (@evaline-ju)

🐛 Fixes

• #4614: Watch: fix crash when reloading files (@outsideris)

📖 Documentation

• #4630: Add options.require to Mocha constructor for root hook plugins on parallel runs (@juergba)
• #4617: Dynamically generating tests with top-level await and ESM test files (@juergba)
• #4608: Update default file extensions (@outsideris)

Also thanks to @outsideris for various improvements on our GH actions workflows.