Update Package.swift

GeometryReader in SwiftUI 2.0 uses a top-leading alignment instead of…

… a centered alignment. This lead to many many issues but have been resolved.

Fixed issues with new SwiftUI layout. The LSlider and Trackpad had im…

…proper positioning after updated to the latest Xcode Beta. I manually set the position of the thumb to be centered in the containing rectangle at 0 offset.

Push

Trying again to fix macOS issues

Fix for Y direction issue of RSlider on macOS

Updated UIFeedback generators for macOS

Updated Slider Issue

Fixed PreferenceKey

Updated Readme