deps(ci): update actions to v4 and node to 20 #235

	name: CI

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

	env:
	NODE_VERSION: 20

	jobs:
	test:
	name: Test
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: prettier --version
	uses: ./
	with:
	args: --version
	- name: prettier --help
	uses: ./
	with:
	args: --help
	- name: prettier --check .
	uses: ./
	with:
	args: --check .
	- name: prettier --write .
	uses: ./
	with:
	args: --write .
	verify-output:
	name: Verify output
	runs-on: ubuntu-latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Setup Node.js ${{ env.NODE_VERSION }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ env.NODE_VERSION }}
	cache: yarn
	- run: yarn install --frozen-lockfile
	- name: Rebuild output
	run: yarn build -o dist-ci
	- name: Verify output
	run: diff -qr dist dist-ci

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