CI #399

	name: CI

	on:
	pull_request:
	push:
	# filtering branches here, prevents duplicate builds from pull_request and push
	branches:
	- master
	- 'v*'
	# always run CI for tags
	tags:
	- '*'

	# early issue detection, run CI weekly on Sundays
	schedule:
	- cron: '0 6 * * 0'

	jobs:
	test:
	name: Test
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]
	node_version: ['8', '10', '12']

	steps:
	- uses: actions/checkout@v1

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

	- name: install yarn
	run: npm install -g yarn cross-env

	- name: install dependencies
	run: yarn install --frozen-lockfile

	- name: lint
	run: yarn lint

	- name: test
	run: cross-env CI=true yarn test

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