Rework old TravisCI test config to GitHub actions #4

	name: Run Tests

	on: [push, pull_request]

	jobs:
	runtests:
	runs-on: ubuntu-latest
	steps:
	- name: Set up Ruby
	uses: ruby/setup-ruby@ec02537da5712d66d4d50a0f33b7eb52773b5ed1
	with:
	bundler-cache: true
	ruby-version: '3.1'
	- name: Set up Python 3
	uses: actions/setup-python@v4
	with:
	python-version: 3
	- name: Install Python dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pyenchant
	- name: Checkout code
	uses: actions/checkout@v3
	with:
	fetch-depth: 250
	- name: Install Ruby gems
	run: bundle install
	env:
	NOKOGIRI_USE_SYSTEM_LIBRARIES: true # speeds up installation of html-proofer
	- name: Build with Jekyll
	uses: actions/jekyll-build-pages@v1
	with:
	source: ./
	destination: ./_site
	- name: Check Spelling
	run: .tests/spellchecker
	- name: Check HTML
	run: .tests/htmlproofer

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