Upgrade Elixir to 1.15.5 And Erlang to 24.3.4 #21

	name: Elixir CI

	on:
	pull_request:

	jobs:
	build:
	name: Build and test
	runs-on: ubuntu-22.04
	env:
	MIX_ENV: test
	ELIXIR_ENV: test
	strategy:
	matrix:
	otp: ["22.3.4", "23.2.7", "24.1", "26.1.2"]
	elixir: ["1.11.4", "1.12.3", "1.15.7"]
	# exclude:
	# Example, but this doesn't need excluded
	# - otp: '22.3.4'
	# elixir: '1.12.3'

	steps:
	- uses: actions/checkout@v2
	- name: Set up Elixir
	uses: erlef/setup-elixir@v1
	with:
	otp-version: ${{matrix.otp}}
	elixir-version: ${{matrix.elixir}}

	- name: Restore dependencies cache
	uses: actions/cache@v2
	with:
	path: deps
	key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
	restore-keys: ${{ runner.os }}-mix-

	- name: Install dependencies
	run: mix deps.get

	- name: Run tests
	run: mix test

	- name: Formatter
	run: mix format --check-formatted

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