ci: verify that the `action.yml` files are in sync #360

	name: Node.js CI
	on:
	push:
	branches: [master]
	pull_request:
	branches: [master]
	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- name: Use Node.js
	uses: actions/setup-node@v3
	with:
	node-version: 20
	- name: Verify that action.yml files are in sync
	run: \|
	npm run update-detached-action.yml &&
	if ! git diff --exit-code \*action.yml
	then
	echo ''::error::action.yml files are not in sync, maybe run `npm run update-detached-action.yml`?'
	exit 1
	fi
	- name: Install dependencies
	run: npm ci
	- name: Run tests
	run: npm run test --coverage
	env:
	CI: "true"
	- name: Build project
	run: npm run build
	- name: Verify that the project is built
	run: \|
	if [[ -n $(git status -s) ]]; then
	echo "ERROR: generated dist/ differs from the current sources"
	git diff
	exit 1
	fi

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