Fix Rubocop and make sure all test pass under all supported version of activesupport #165

	# This workflow uses actions that are not certified by GitHub.
	# They are provided by a third-party and are governed by
	# separate terms of service, privacy policy, and support
	# documentation.
	# This workflow will download a prebuilt Ruby version, install dependencies and run tests with Rake
	# For more information see: https://github.com/marketplace/actions/setup-ruby-jruby-and-truffleruby

	name: build

	on: [push, pull_request]

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	ruby: ['2.7', '3.0', '3.1', '3.2', '3.3']
	rails: ['5.2.7', '6.0.4', '6.1.7', '7.0.8', '7.1.1']
	include:
	- rails: '4.0.1'
	ruby: '2.7'
	- rails: '4.1.1'
	ruby: '2.7'
	- rails: '4.2.1'
	ruby: '2.7'
	- rails: '5.0.1'
	ruby: '2.7'
	- rails: '5.1.1'
	ruby: '2.7'

	steps:
	- uses: actions/checkout@v2
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	cache-version: rails-${{ matrix.rails }} # for the cache key
	bundler-cache: true # runs 'bundle install' and caches installed gems automatically
	- name: Run rubocop
	run: bundle exec rubocop
	- name: Run tests
	run: bundle exec rspec
	- name: Run benchmark
	run: bundle exec rake benchmark

	env:
	RAILS_VER: ${{ matrix.rails }}

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