Merge v5 into master

Highlights of this release
* Easier installation
* autolink and reac-native link support
* Shared Element Transition - reimplemented from scratch and new API
* [iOS] showModal animation api parity
* [Android] Animation values are now declared in dp
* [iOS] deprecate topBar.drawBehind
* [Android] RNN is migrating to Kotlin

closes #5904

* Migrate project to workspace

This commit moves all unit tests to the playground workspace

* Fix ios unit tests

* Build pods before testing

* Build typescript before running iOS tests

* Remove xcode 10 support

Break all the PRs :(

iOS and Android code base used different naming conventions - this commit aims to unify naming conventions. I probably missed a few properties here and there so this will be an ongoing effort.

This commit adds initial support for passing null as a valid value for color properties.
When a color property is applied, if it wasn't specified then the default color is applied. Now, when null is passed, no color will be applied
leaving the last color applied as is.

This is useful when showing an Overlay and you'd like to keep the current StatusBar color unaffected. Another usecase would be when you'd like to avoid coloring an icon in BottomTabs.

Add support for dot indicator to BottomTabs.

Added unit test coverage on iOS