Use GitHub Actions for linting and testing as well as update gemspec #3

	name: Tests

	on:
	pull_request:

	permissions:
	contents: read

	jobs:
	tests:
	strategy:
	matrix:
	# test a range of Ruby to ensure gem works
	# keep ruby until EOL. Read more on https://endoflife.date/ruby
	ruby-version:
	- 3.0
	- 3.1
	- 3.2
	- 3.3
	- head
	# test distributions up to 4 years
	runner:
	- ubuntu-22.04
	- ubuntu-20.04
	fail-fast: false # allows contributors understand failure builds

	runs-on: ${{ matrix.runner }}

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Ruby and install dependencies
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true

	- name: Run tests
	run: bundle exec rake test

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