Always `#include <ruby.h>` before any system header. #1

	name: Test External

	on: [push, pull_request]

	permissions:
	contents: read

	env:
	CONSOLE_OUTPUT: XTerm
	RUBY_DEBUG: true

	jobs:
	test:
	name: ${{matrix.ruby}} on ${{matrix.os}}
	runs-on: ${{matrix.os}}-latest

	strategy:
	matrix:
	os:
	- ubuntu
	- macos

	ruby:
	- "3.1"
	- "3.2"
	- "3.3"
	- "head"

	steps:
	- uses: actions/checkout@v4
	- uses: ruby/setup-ruby@v1
	with:
	ruby-version: ${{matrix.ruby}}
	bundler-cache: true

	- name: Run tests
	timeout-minutes: 10
	run: bundle exec bake build test:external

	# - name: Run tests (pure Ruby)
	# env:
	# IO_EVENT_SELECTOR: Select
	# timeout-minutes: 10
	# run: bundle exec bake build test:external

Provide feedback