dependabot, use checkoutv4 in ci, update devcontainer #10

	name: Ruby

	on:
	- push
	- pull_request

	jobs:
	test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	ruby: [3.0, 3.1, 3.2, 3.3, head, truffleruby-head]
	env:
	RAILS_ENV: test
	steps:
	- uses: actions/checkout@v4
	- name: Set up Ruby
	uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{ matrix.ruby }}
	bundler-cache: true # bundle installs and caches dependencies
	- name: Run tests
	run: bundle exec rake --trace

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