v3.3.0.pre.2 pre-release

✨ New Features

• use file size to check for modifications (#336) @marawan31
• Ignore mutagen sync temporary files (#469) @nilbus
• Add GitHub Actions for development workflow. (#485) @ioquatix
• Allow Ruby 3 (#490) @yahonda
• Add Truffleruby head to CI (#493) @gogainda
• add magic # frozen_string_literal: true comment (#494) @ColinDKelley

🐛 Bug Fixes

• Fix: Tracking of removed subdirectories (#460) @bryanlira
• Use one fsevent_watch process per listener instead of one per dir (#471) @ioquatix
• Wrap Listener instances in WeakRef (#477) @jonathanhefner
• Include macOS Big Sur in Adapter::Darwin#usable? (#479) @christiankn
• fix hanging race condition (#481) @ColinDKelley
• Remove Listen::Internals::ThreadPool (#483) @jonathanhefner
• Tidy up thread killing. Remove JRuby workaround. (#484) @ioquatix
• move thread caller stack and rescue+log to a common place (#487) @ColinDKelley
• unify logging through Listen.logger; add missing logger_spec (#497) @ColinDKelley