Mark compatibility with ng 15 peer (angular#3291)

* Drop ng12 from the tests, JS SDK (typescript) broke, not work hunting for a good version IMO
* Skip prerender test on ng13, broken not worth hunting the flake IMO
* Add ng15 to the matrix, add upgrade to ng14 step
* Bump the version
* Add ng15 to the acceptable peers
* Add to README
* Contrib tests are failing on newer Node, we should look into but not block merging and cutting

chore(deps): Allow firebase-tools 11 peer

chore(misc): bump deps, version, changelog, readme

* Bump firebase again
* Contribute windows node 14 needed a java bump too
* Add readme for ng 14
* Drop IE references in readme
* Add changelog

Update Firebase, make it a dep rather than peer (angular#3159)

* Update Firebase, wrap the storage APIs introduced in 9.5
* Move rxfire and firebase to dep, rather than peers, to better model the NPM requirements for wrapping
* Bump minor, changelog
* Mark firebase-tools 10 peer as compatible
* Clean up the test suite
* Drop the .proto references from firestore-protos and mark as deprecated

chore(release): 7.2.1 (angular#3152)

feat(core): NG13 peer (angular#3057)

* Bump version
* Bump deps
* Clean up deps a bit more
* Support ng13
* upgrade samples
* Switch tools/jasmine.js to imports
* Drop webpack resolution
* Drop the failing tests for now
* changelog

chore(release): 7.1.1 (angular#3024)

chore(release): Fix hang in the test suite (angular#3005)

* Check for file existence before `npm install` on deploy, this was hanging up in some test environments
* Prefer absolute paths on the deploy pipeline
* Fix `ng add` stalling if you don't select any options

feat(core): Flushing out the new API (angular#2963)

* Adding `ScreenTrackingService` and `UserTrackingService` for the new API
* Injectable classes should all be implicitly optional, since I can't figure out how to bail from the factory
* Drop the memoization as the modules are idempotent in v9
* Return `null` from analytics and messaging when they're incompatible, rather than a null object
* Now test for browser and return `null` otherwise for remote config and performance
* Allow more advanced initialization in `provide*` by allowing the developer to pass deps into the N+1 args & use the injector in the factory
* Use AppCheck debug token if they're serving off localhost too, e.g, `ng deploy --preview`
* Upgrade Firebase to 9.1
* Utilize isSupported for Remote Config

fix(schematics): Various improvements (angular#2961)

* Support multiple package managers on ng deploy, fixes angular#2841
* Don't cache ngsw, fixes angular#2259
* Got rid os AppCheck debug token on Node, opted for a better pattern in `samples/advanced`
* Added a new pattern for connecting the emulators in `samples/advanced`