ci: remove node.js version 23, 24 #85

	name: continuous integration
	on: [ push, pull_request ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	node-version: [ 20.x ]

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v1
	with:
	node-version: ${{ matrix.node-version }}

	# https://docs.github.com/en/free-pro-team@latest/actions/guides/caching-dependencies-to-speed-up-workflows
	- name: Cache node modules
	uses: actions/cache@v2
	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 }}-

	- name: Install dependencies
	run: \|
	npm install
	npm install -g typescript
	npm install -g ts-node

	- name: Linting with Standard.js
	run: npm run standard

	- name: Test and test coverage
	run: npm run coverage.check

	- name: Build package
	run: npm run build

	- name: Mutation test
	env:
	STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
	run: \|
	npx stryker run

	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v1

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