Add github actions #4

	name: CI

	# CI is run on pull requests and on push to the main branch
	on:
	pull_request:
	push:
	branches: [ main ]

	jobs:
	test:
	# This job is to run the tests
	name: Run tests
	runs-on: ubuntu-latest

	steps:
	# Clone the repository
	- uses: actions/checkout@v2

	# Setup Node JS
	- uses: actions/setup-node@v2
	with:
	node-version: 16

	- name: Cache node modules
	id: cache-npm
	uses: actions/cache@v3
	env:
	cache-name: cache-node-modules
	with:
	# npm cache files are stored in `~/.npm` on Linux/macOS
	path: ~/.npm
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
	restore-keys: \|
	${{ runner.os }}-build-${{ env.cache-name }}-
	${{ runner.os }}-build-
	${{ runner.os }}-


	# Install elm and cache ELM_HOME
	- name: Install dependencies
	run: npm install

	- name: Check formatting
	run: npm run test:format

	- name: Run the tests
	run: npm run test:elm

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