v0.16.4

✨ Enhancements

• Add watched_files_dynamic_registration to global state (#1905) by @Earlopain

🐛 Bug Fixes

• Run initialize and document synchronization in main thread (#1915) by @vinistock

📦 Other Changes

• Ignore non-ruby files in file watcher (#1912) by @Earlopain
• Remove Singleton from formatters (#1904) by @Earlopain