Implement switch -h, --help to CLI #503

	name: Elixir CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:

	name: Build and test
	runs-on: ubuntu-20.04

	steps:
	- name: Check out the repository
	uses: actions/checkout@v3
	- name: Set up Elixir
	uses: erlef/setup-beam@v1
	with:
	elixir-version: '1.12.3'
	otp-version: '24.1'
	- name: Restore dependencies cache
	uses: actions/cache@v3
	with:
	path: deps
	key: ${{ runner.os }}-mix-${{ hashFiles('**/mix.lock') }}
	- name: Install dependencies
	run: mix deps.get
	- name: Run tests
	run: mix test
	- name: Check formatting
	run: mix format --check-formatted

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