Update deps to work with new Elixir/OTP #21

	name: Continuous integration
	on:
	push:
	branches: ["*"]
	tags: ["v*"]
	pull_request:
	branches: ["develop"]

	jobs:
	test:
	# runs-on: ubuntu-latest
	runs-on: ubuntu-20.04

	services:
	postgres:
	image: postgres
	env:
	POSTGRES_PASSWORD: postgres
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5
	ports:
	- 5432:5432
	rabbitmq:
	image: rabbitmq:3.8
	env:
	RABBITMQ_DEFAULT_USER: guest
	RABBITMQ_DEFAULT_PASS: guest
	ports:
	- 5672:5672

	strategy:
	matrix:
	include:
	# This is what docker builds.
	- elixir-version: "1.9"
	otp-version: "21"
	# Current (at time of writing) versions.
	- elixir-version: "1.17"
	otp-version: "27"

	steps:
	- uses: actions/checkout@v4
	- uses: erlef/setup-beam@v1
	id: beam
	with:
	elixir-version: ${{ matrix.elixir-version }}
	otp-version: ${{ matrix.otp-version }}

	- name: Fetch deps
	run: \|
	mix deps.get

	- name: Run tests
	run: \|
	# This is basically `mix test` with coverage enabled.
	mix coveralls.json

	- name: Lints
	# Let the build succeed for now even if the lints fail.
	continue-on-error: true
	run: \|
	mix format --check-formatted
	# This will mention FIXME and TODO comments without failing, any
	# other issue fails the build.
	mix credo

Provide feedback