FileWatcherEx 2.3.0 - Test, Refactor and Test

What's Changed

• Improvement: extract interface by @samba2 in #9
• Add Integration Tests by @samba2 in #10
• Feature/extract event normalizer by @samba2 in #11
• Feature/refactor event processor by @samba2 in #12
• Fix integration test by @samba2 in #13
• Feature/refactor file watcher by @samba2 in #14

Full Changelog: 2.2.0...2.3.0