update to `spago@next` #48

	name: CI

	on:
	push:
	pull_request:

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Set up a PureScript toolchain
	uses: purescript-contrib/setup-purescript@main
	with:
	purescript: "unstable"
	spago: "unstable"
	purs-tidy: "latest"

	- uses: actions/setup-node@v2
	with:
	node-version: "20"

	- name: Cache PureScript dependencies
	uses: actions/cache@v2
	with:
	key: ${{ runner.os }}-spago-${{ hashFiles('*/.dhall') }}
	path: \|
	.spago
	output

	- name: Install dependencies
	run: spago install

	- name: Build source
	run: spago build

	- name: Run tests
	run: spago test

	- name: Check formatting
	run: purs-tidy check src test

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