update github actions, ready for node16 deprecation #132

	name: CI
	on: [push, pull_request]

	jobs:
	test:
	name: Lint and test
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/checkout@v4

	- name: Setup nodejs
	uses: actions/setup-node@v4
	with:
	node-version: "20"

	- name: Install dependencies
	run: npm ci

	- name: Check style with prettier
	run: npm run format-check

	- name: Run tests
	run: npm test

	- name: Compare the expected and actual dist/ directories
	run: \|
	npm run build
	if [ "$(git diff --ignore-blank-lines --ignore-space-at-eol dist/ \| wc -l)" -gt "0" ]; then
	echo "Detected uncommitted changes after build. See status below:"
	git diff
	exit 1
	fi

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