build: configure Google npm publishing service and pin CI actions for…

… v20.1.0 release

chore: bump version to 21.0.0-rc.1 (#3751)

The publish job reads this literal at tag time. The sample's file:
tarball dependency path and its README install example carry the
same version, so they move together.

The root lockfile records the same version in its two version fields.
The sample's lockfile deliberately keeps the rc.0 tarball name, because
it also records that tarball's integrity hash.

chore(release): 20.0.3

Prep for AngularFire v21 (#3674)

- Bump all Angular dependencies to `^21.0.0` build to `~0.2100.0`
- Bump firebase to next major
- Drop vertexai
- Lots of lint and tsconfig drama
- Unbork Github Actions

fix: Avoid handling promise rejections twice in stability helper (#3657)

`PendingTasks.run` reports rejections of the promise to the
`ErrorHandler`. This function already returns a promise that is meant to
be handled in the developer's application. If there _is_ handling there,
the rejection is handled both in the `PendingTasks.run` and in the
developer callsite.

This change updates the code to use `PendingTasks.add` instead, which
has no built in error handling mechanisms.

fixes angular/angular#61932

Preparing v20 release (#3655)

* Bump peers, bump version
* Quick fix for build:jasmine
* Remove upset test for now

Preparing v20 release (#3655)

* Bump peers, bump version
* Quick fix for build:jasmine
* Remove upset test for now

19.2.0 release (#3651)

Bump action, bump minor (#3644)

* Bump minor
* Bump upload/download artifact

zone log verbosity (#3613)

* Bunch of stuff
* Bump firebase
* Cleanup