Prep for AngularFire v21 #2454

Job	Run time
Contribute Node 20 (macos-latest)	2s
Contribute Node 20 (windows-latest)	2s
Build	3s
Contribute Node 20 (ubuntu-latest)	2s
Test ${{ matrix.browser }}	-1s
Test Node ${{ matrix.node }} (${{ matrix.os }})	-1s
Publish (NPM)	-1s
Branch protection	-1s
	5s

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