Modernize packaging #80

	name: CI

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

	jobs:
	package_check:
	if: "github.repository == 'MDAnalysis/mdanalysis-sphinx-theme'"
	name: some packaging checks
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: ["3.9", "3.10", "3.11", "3.12"]

	steps:
	- uses: actions/checkout@v4
	with:
	submodules: 'true'

	- uses: actions/setup-python@v5
	with:
	python-version: ${{ matrix.python-version }}

	- name: build
	shell: bash
	run: \|
	pipx run build

	- name: twine check
	shell: bash
	run: \|
	pipx run twine check --strict ./dist/*tar.gz

	- name: pip check
	shell: bash
	run: \|
	pip install -e .
	pip check

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