- Address various issues with tint color on text nodes
- Avoid accessing `self.tintColor` off-main since this will trigger an
assertion and might be undefined behavior
- Trigger setNeedsDisplay in cases of hierarchy change and
tintColorDidChange in ASButtonNode, ASTextNode{1,2}
- Fix bug in _ASTableViewCell where we were overwriting the tint color
instead of inheriting the correct value
- Add tests for new logic in changing hierarchy
- Add the ability to specify a tintColor for images / buttons that behave similarly to how they would under UIKit.
- Add flag to control if tint color is applied to ASTextNode to match how
UIKit controls if it is .applied to UILabel.
- Update tests for not-tinting automatic render mode for UIImage.
- Add property on ASTextNode2.
- Add tint color support to ASTextNode2.