update CI configuration to include Ruby 2.7 in the testing matrix #117

	name: serpapi-ruby
	on:
	push:
	branches: [ master, dev ]
	pull_request:
	branches: [ master ]
	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	ruby: ['2.7', '3.1.0','head'] # test only recommend Ruby version (and stable version on the gitaction server)
	steps:
	- uses: actions/checkout@v4
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true
	- name: install dependencies
	run: bundle install
	- name: lint
	run: bundle exec rake lint
	- name: tests
	env:
	SERPAPI_KEY: ${{ secrets.SERPAPI_KEY }}
	run: bundle exec rake test
	- name: out of box testing
	env:
	SERPAPI_KEY: ${{ secrets.SERPAPI_KEY }}
	run: bundle exec rake oobt

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