Fix linting and type checks #170

	name: Build
	on:
	- push
	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.2.2
	bundler-cache: true
	- name: Lint
	run: \|
	gem install rubocop -v 1.50.2
	gem install rubocop-rspec -v 2.20.0
	gem install rubocop-performance -v 1.15
	rubocop

	type-check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: 3.1.1
	bundler-cache: true
	- name: RBS type checking with Steep
	run: \|
	gem install steep -v 1.4.0
	steep check --log-level=fatal

	build-test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	ruby:
	- '2.5'
	- '3.2.2'
	steps:
	- uses: actions/checkout@v2
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true
	- name: Test
	run: bundle exec rspec

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