Fix display link crash on iPhone 11 Pro

Fixes an issue with animating affine scale and translation.

Version `0.3.0` adds macOS as a supported platform for Wave, and enab…

…les first-class animation support for AppKit.

AppKit apps can now use both the block-based and property-based animation APIs. There's also a tiny sample app for reference. In a separate patch, I'll add `NSView` support, so you can animate `frame`, `bounds`, etc., and not just properties on `CALayer`.

Other improvements/additions:
* Support for animating `CALayer.borderColor/borderWidth`
* Significantly improved color animation (`UIColor` and `NSColor`)
* Fixed a retain cycle/leak

Support 120 fps animation on ProMotion devices.

Version `0.2.0` renames the `Animation` class to `SpringAnimator`, wh…

…ich enables Wave to be used with SwiftUI.

Due to the API renaming, this version is a breaking change. However, there are only two types that have been renamed, so clients shouldn't have too much difficulty updating to the new name.

Update animatable properties in readme

Commit docs site