Replace Travis with github actions #3

	name: Tests

	on:
	pull_request:
	push:
	branches:
	- master
	tags:
	- '' # Push events to matching v, i.e. v1.0, v20.15.10

	jobs:
	build:
	name: CI
	runs-on: ${{ matrix.os }}
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest, macos-latest, windows-latest]
	resolver: [nightly, lts-21, lts-20, lts-19]
	# Bugs in GHC make it crash too often to be worth running
	#exclude:
	# - os: windows-latest
	# resolver: nightly

	steps:
	- name: Clone project
	uses: actions/checkout@v3

	- name: Cache dependencies on Unix-like OS
	if: startsWith(runner.os, 'Linux') \|\| startsWith(runner.os, 'macOS')
	uses: actions/cache@v3
	with:
	path: ~/.stack
	key: ${{ runner.os }}-${{ hashFiles('stack.yaml') }}

	- name: Cache dependencies on Windows
	if: startsWith(runner.os, 'Windows')
	uses: actions/cache@v3
	with:
	path: \|
	~\AppData\Roaming\stack
	~\AppData\Local\Programs\stack
	key: ${{ runner.os }}-${{ hashFiles('stack.yaml') }}

	- name: Build and run tests
	shell: bash
	run: \|
	set -ex
	curl -sSL https://get.haskellstack.org/ \| sh -s - -f
	stack test --fast --no-terminal --resolver=${{ matrix.resolver }}
	- name: Release
	uses: softprops/action-gh-release@v1
	if: startsWith(github.ref, 'refs/tags/')
	with:
	generate_release_notes: true

Provide feedback