Bump actions/checkout from 3 to 4 #84

	name: test book

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build-book:
	runs-on: ubuntu-latest
	defaults:
	run:
	shell: bash -l {0}
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	persist-credentials: false

	# Checks that the schemas are valid
	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.11"

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip setuptools
	pip install -r requirements.txt

	- name: Python info
	run: \|
	python --version
	pip list

	- name: Test Book
	run: \|
	make test

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