release: cut the 8.0.0 release (NativeScript#1840)

* release: cut the 8.0.0 release

* chore: update changelog with migration steps for Angular 7.x.x to Angular 8.0.0

fix: revert recursie remove -causing crashes (NativeScript#1819)

Merge pull request NativeScript#1762 from NativeScript/release-7.2.3

release: cut the 7.2.3

release: cut the 7.2.2 release (NativeScript#1742)

Merge pull request NativeScript#1724 from NativeScript/release-7.2.1

docs: cut the 7.2.1 release

release: cut the 7.2.0 release

Merge pull request NativeScript#1698 from NativeScript/release-7.1.2

Release 7.1.2

release: cut the 7.1.1 release

release: cut the 7.1.0 release

release: cut the 7.0.3 release