drop node <18 support, update ci, disable package-lock #71

	name: ci

	on:
	pull_request:
	paths-ignore:
	- '*.md'
	push:
	branches:
	- master
	- 1.0.0
	- 2.0.0
	paths-ignore:
	- '*.md'

	jobs:
	test:
	runs-on: ubuntu-20.04
	strategy:
	matrix:
	name:
	- Node.js 18.x
	- Node.js 19.x
	- Node.js 20.x
	- Node.js 21.x

	include:
	- name: Node.js 18.x
	node-version: "18"

	- name: Node.js 19.x
	node-version: "19"

	- name: Node.js 20.x
	node-version: "20"

	- name: Node.js 21.x
	node-version: "21"

	steps:
	- uses: actions/checkout@v4

	- name: Install Node.js ${{ matrix.node-version }}
	shell: bash -eo pipefail -l {0}
	run: \|
	nvm install --default ${{ matrix.node-version }}
	dirname "$(nvm which ${{ matrix.node-version }})" >> "$GITHUB_PATH"

	- name: Install Node.js dependencies
	run: npm install

	- name: List environment
	id: list_env
	shell: bash
	run: \|
	echo "node@$(node -v)"
	echo "npm@$(npm -v)"
	npm -s ls \|\|:
	(npm -s ls --depth=0 \|\|:) \| awk -F'[ @]' 'NR>1 && $2 { print "::set-output name=" $2 "::" $3 }'

	- name: Run tests
	shell: bash
	run: \|
	if npm -ps ls nyc \| grep -q nyc; then
	npm run test-ci
	else
	npm test
	fi

	- name: Lint code
	run: npm run lint

	- name: Collect code coverage
	uses: coverallsapp/github-action@master
	if: steps.list_env.outputs.nyc != ''
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	flag-name: run-${{ matrix.test_number }}
	parallel: true

	coverage:
	needs: test
	runs-on: ubuntu-latest
	steps:
	- name: Upload code coverage
	uses: coverallsapp/github-action@master
	with:
	github-token: ${{ secrets.GITHUB_TOKEN }}
	parallel-finished: true

Provide feedback