Bump actions/checkout from 3 to 4 #89

	# base configuration pulled from:
	# https://github.com/dashbitco/broadway/blob/master/.github/workflows/ci.yml

	name: CI

	on:
	pull_request:
	push:
	branches:
	- "*"

	jobs:
	lint:
	runs-on: ${{ matrix.os }}
	env:
	MIX_ENV: dev
	name: Lint
	strategy:
	matrix:
	os: ["ubuntu-20.04"]
	elixir: ["1.14"]
	otp: ["25"]
	steps:
	- uses: actions/checkout@v4
	- uses: erlef/setup-beam@v1
	with:
	otp-version: ${{ matrix.otp }}
	elixir-version: ${{ matrix.elixir }}
	- uses: actions/cache@v3
	with:
	path: deps
	key: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ matrix.os }}-otp_${{ matrix.otp }}-elixir_${{ matrix.elixir }}-mix_
	- run: mix deps.get
	- run: mix deps.compile
	- run: mix format --check-formatted
	- run: mix deps.unlock --check-unused
	- run: mix compile --warnings-as-errors

	test:
	runs-on: ${{ matrix.os }}
	env:
	MIX_ENV: test
	GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
	name: Test Elixir ${{ matrix.elixir }}, OTP ${{ matrix.otp }}, OS ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: ["ubuntu-latest"]
	elixir: ["1.15", "1.14", "1.13", "1.12"]
	otp: ["26", "25"]
	exclude:
	- elixir: "1.12"
	otp: "25"
	- elixir: "1.12"
	otp: "26"
	- elixir: "1.13"
	otp: "26"
	include:
	- elixir: "1.14"
	opt: "25"
	coverage: coverage
	steps:
	- uses: actions/checkout@v4
	- uses: erlef/setup-beam@v1
	with:
	otp-version: ${{matrix.otp}}
	elixir-version: ${{matrix.elixir}}
	- run: mix deps.get --only test
	- run: mix deps.compile
	- run: mix test
	- run: mix coveralls.github
	if: ${{matrix.coverage}}

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