Modernize #59

	name: Haskell CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	strategy:
	matrix:
	ghc: ['8.8.2', '8.10.1', '9.2.5', '9.4.4']
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-haskell@v1
	with:
	ghc-version: ${{ matrix.ghc }}
	cabal-version: '3.2'
	- uses: harmon758/postgresql-action@v1
	with:
	postgresql version: '13'
	postgresql db: 'test'
	postgresql user: 'postgres'
	postgresql password: 'password'

	- name: Cache
	uses: actions/cache@v1
	env:
	cache-name: cache-cabal
	with:
	path: ~/.cabal
	key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('*/.cabal') }}-${{ hashFiles('**/cabal.project') }}
	restore-keys: \|
	${{ runner.os }}-build-${{ env.cache-name }}-
	${{ runner.os }}-build-
	${{ runner.os }}-

	- name: Install dependencies
	run: \|
	cabal v2-update
	cabal v2-build --only-dependencies --enable-tests --enable-benchmarks
	- name: Run checks
	run: \|
	cp ./README.md ./selda/README.md
	make license
	cabal v2-run selda-changelog md
	make check

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