chore: Package, Gradle, and Manifest Updates for Improved Compatibility - #31

This pull request brings several important updates to the keyboard_attachable package, enhancing its compatibility and ensuring optimal performance. Here's a breakdown of the changes made:

1. Package Number and Version Update:

   • The package number and version have been updated to align with the latest SDK version, ensuring compatibility with the newest Flutter features and improvements.

2. Flutter Keyboard Visibility Update:

   • The flutter_keyboard_visibility package has been updated to version 5.4.1, enhancing keyboard visibility management for a seamless user experience.

3. SDK Version Constraints Update:

   • The example's SDK version constraints have been updated to ensure compatibility with the latest Flutter SDK, providing a reliable environment for testing and development.

4. Gradle Updates:

   • Gradle has been updated to version 7.5, bringing in performance improvements and enhanced build capabilities.
   • Compile and target SDK versions have been set to 31, aligning with the latest Android platform for optimal functionality.
   • Gradle and Kotlin versions have been updated to leverage the latest features and improvements in the build process.

5. Android 12 Support:

   • The manifest now includes exported=true to provide compatibility with Android 12, ensuring a smooth experience for users on the latest Android version.

6. Code Refactoring - Should Relayout:

   • A refactoring has been performed in the shouldrelayout function, ensuring accurate checking for layout reconfiguration.

These updates collectively enhance the package's stability, compatibility, and performance. This PR aims to provide users with an improved experience when integrating keyboard_attachable into their Flutter projects.

This PR will resolved #29.

Thank you for your attention and happy coding! 🚀