ci: add test with older TypeScript version #211

	name: CI

	on:
	push:
	pull_request:
	schedule:
	- cron: '0 0 * * 0'

	permissions:
	contents: read

	jobs:
	test-node:
	runs-on: ubuntu-latest
	timeout-minutes: 10

	strategy:
	matrix:
	node-version:
	- 14
	- 20

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Use Node.js ${{ matrix.node-version }}
	uses: actions/setup-node@v4
	with:
	node-version: ${{ matrix.node-version }}

	- name: Install dependencies
	run: npm ci

	# the "override" keyword was added in [email protected]
	# else, users can go down to [email protected] ("import type")
	- name: Install TypeScript 4.5
	run: npm i [email protected]
	if: ${{ matrix.node-version == '14' }}

	- name: Run tests
	run: npm test

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