Release version 5.1.0 with bug fixes, new features, and internal improvements
- Fixed animation issues in Bounce, Spin, and MoveTo classes for better consistency and reliability.
- Introduced new
FlipXandFlipYanimations with improved perspective handling. - Unified default parameters across multiple animation classes for consistency.
- Enhanced internal state management and added comprehensive widget tests for various animations.
- Updated CHANGELOG.md to reflect all changes and improvements.