Bump crazy-max/ghaction-github-pages from 2 to 4 #301

	name: Crystal CI

	on:
	push:
	pull_request:
	schedule:
	- cron: '0 0 * * *'

	jobs:
	check_format:
	runs-on: ubuntu-latest
	container:
	image: crystallang/crystal
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: shards install
	- name: Check format
	run: crystal tool format --check
	check_ameba:
	runs-on: ubuntu-latest
	container:
	image: crystallang/crystal
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: shards install
	- name: Check ameba
	run: ./bin/ameba
	test_latest:
	runs-on: ubuntu-latest
	container:
	image: crystallang/crystal
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: shards install
	- name: Run tests
	run: crystal spec
	test_nightly:
	runs-on: ubuntu-latest
	container:
	image: crystallang/crystal:nightly
	steps:
	- uses: actions/checkout@v2
	- name: Install dependencies
	run: shards install
	- name: Run tests
	run: crystal spec

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