Add compatibility with --enable-frozen-string-literal #2

	name: Main
	on:
	push:

	jobs:
	tests:
	name: Tests
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	ruby: ["2.7", "3.0", "3.1", "3.2", "3.3"]
	rubyopt: [""]
	include:
	- ruby: "3.3"
	rubyopt: "--enable-frozen-string-literal --debug-frozen-string-literal"

	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Setup Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true

	- name: Generate lockfile
	run: bundle lock

	- name: Run tests
	run: bundle exec rake test RUBYOPT="${{ matrix.rubyopt }}"

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