Version 4.6.0

Changelog:

• Updated guzzlehttp/guzzle from 7.8.1 to 7.9.0 (#390, bf44cbd)
• Updated supported binwiederhier/ntfy version from 2.10.0 to 2.11.0 (#377, 043db4f)
• Renamed and move abstract classes. (#367, 3e37deb)
• Changed auth parameter in Client construct to use union types. (#392, 81cfc7d)

All changes: v4.5.2...v4.6.0