Add markdown-doctest #296

	name: CI

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest

	strategy:
	matrix:
	node-version: [16.x, 18.x, 20.x, 22.x]

	steps:
	- uses: actions/checkout@v1
	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v1
	with:
	node-version: ${{ matrix.node-version }}
	- name: npm install, build, and test
	run: \|
	npm install
	npm test
	env:
	CI: true
	- name: Upload coverage reports to Codecov
	uses: codecov/[email protected]
	with:
	token: ${{ secrets.CODECOV_TOKEN }}
	if: matrix.node-version == '22.x'

	formatting:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	- uses: actions/setup-node@v1
	with:
	node-version: 20.x
	- name: npm install, check formatting
	run: \|
	npm install
	npm run check

	doctest:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v1
	- uses: actions/setup-node@v1
	with:
	node-version: 20.x
	- name: npm install, run doctest
	run: \|
	npm install
	npm run doctest

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