upgrade github actions due deprecation notice #1

	name: Elixir CI

	on: push

	jobs:
	compile:
	runs-on: ubuntu-latest
	container:
	image: elixir:1.9.4-slim
	env:
	MIX_ENV: prod
	steps:
	- uses: actions/checkout@v1
	- name: install dependencies
	run: \|
	mix local.rebar --force
	mix local.hex --force
	mix deps.get --only prod
	- name: compile
	run: mix compile --force

	test:
	runs-on: ubuntu-latest
	container:
	image: elixir:1.9.4-slim
	env:
	MIX_ENV: test
	steps:
	- uses: actions/checkout@v1
	- name: install dependencies
	run: \|
	mix local.rebar --force
	mix local.hex --force
	mix deps.get --only test
	- name: test
	run: mix test --cover --trace
	- name: archive code coverage
	uses: actions/upload-artifact@v4
	with:
	name: cover-${{ matrix.runs-on }}
	path: cover

	static_code_analysis:
	runs-on: ubuntu-latest
	container:
	image: elixir:1.9.4-slim
	env:
	MIX_ENV: dev
	steps:
	- uses: actions/checkout@v1
	- name: install dependencies
	run: \|
	mix local.rebar --force
	mix local.hex --force
	mix deps.get --only dev
	- name: plt cache
	uses: actions/[email protected]
	with:
	path: _build
	key: ${{ runner.os }}-plt-${{ env.GITHUB_REF }}
	restore-keys: \|
	${{ runner.os }}-plt-
	- name: formatted?
	run: mix format --check-formatted --dry-run
	- name: credo
	run: mix credo --verbose
	- name: dialyzer
	run: mix dialyzer --halt-exit-status

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