Add support for Ruby 3.3 and drop 2.7 #35

	name: Install Tests
	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	ruby-version:
	- "3.0"
	- "3.1"
	- "3.2"
	- "3.3"

	steps:
	- uses: actions/checkout@v3
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby-version }}
	bundler-cache: true # runs 'bundle install' and caches installed gems automatically
	- name: "Install"
	run: bundle exec rake install
	- name: "Command: Version"
	run: bundle exec stylegen version
	- name: "Command: Init"
	run: bundle exec stylegen init
	- name: "Command: Build"
	run: bundle exec stylegen build

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