Added better support for UITableView and UICollectionView source views.

• Added support for Swift Package Manager
• Improved the functionality of the library

Ignore deprecations when compiling

Correctly take into account the previewed view's bounds for the preview snapshot.

Resolve shared scheme issues

• Support unregistering for preview

• Supports storyboard and code-based previewing
• Optionally, support add images to your existing preview action items to display as menu item images
• Support for devices without 3D Touch (including iPhone 11)
• macOS Catalyst support (your preview actions are displayed as a context menu)