v3.4.0

Added

• Added a wait_until method for Linux, as a superset of the existing wait functionality.
  This is a helper for letting an application wait without manual timeout handling.

Fixed

• Transparency in copied images now behaves better in certain Windows apps.

Changed

• Updated image to 0.25.
• Removed direct thiserror dependency.
• Fixed Linux documentation links
• Raised MSRV to 1.67.1
• Reverted timeout behavior of Clipboard::new() on platforms using X11. Applications are
  encouraged to wrap constructor calls in their own thread/channel timeout mechanisms instead
  to make sure the behavior matches each usecase.
• Migrated away from objc to the objc2 ecosystem for the Apple clipboard implementation.

Full Changelog: v3.3.2...v3.4.0