Add explicit deprecations for Heroku 20 + 22, errors for 24 #16

	name: buildpack-google-chrome

	on: push

	jobs:
	test:
	strategy:
	matrix:
	stack: [heroku-18, heroku-20, heroku-22]
	channel: [stable, beta, unstable]
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3

	- name: Run Test
	run: ./support/test.sh ${{ matrix.stack }}
	env:
	GOOGLE_CHROME_CHANNEL: ${{ matrix.channel }}

	# dummy job to wait and block merge until all jobs have completed
	done:
	runs-on: ubuntu-latest

	needs: [test]

	steps:
	- run: echo done
	working-directory: /

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