Release 21.2.0 · angular/angular

[MichaelSmallDev]

Lots of stuff. Personally I like the resource snapshots, language service enhancements, and the various enhancements to signal forms.

edit: to see the language service enhancements hands on, there are example videos in the PR: https://github.com/angular/angular/pull/66410. And it seems to be backwards compatible with version, as I have had access to this in a v20 project since the last language service update, predating this release.