add code formatting to autogen action #304

	name: Specs

	on: [push, pull_request]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	matrix:
	crystal-version: [1.10.1]

	steps:
	- uses: actions/checkout@v2
	- uses: oprypin/install-crystal@v1
	with:
	crystal: ${{ matrix.crystal-version }}

	- name: Install dependencies
	run: shards install --ignore-crystal-version

	- name: Format code
	run: crystal tool format && git diff --exit-code

	- name: Run tests
	run: crystal spec

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