Add very basic testing for `_plotting.py`, fix a few minor things (#240) #22

	name: Publish sdist tarball to PyPi

	on:
	push:
	tags:
	- 'v[0-9]+.[0-9]+.[0-9]+'

	jobs:
	build-n-publish:
	name: Build and publish on PyPI
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.11
	uses: actions/setup-python@v4
	with:
	python-version: "3.11"
	- name: Build a source tarball
	run:
	python setup.py sdist

	- name: Publish distribution package to PyPI
	uses: pypa/gh-action-pypi-publish@release/v1
	with:
	user: __token__
	password: ${{ secrets.PYPI_PASSWORD }}

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