Add option for replacing zeros in matrix with \cdot #36

	name: Python package

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version:
	- "3.7"
	- "3.8"
	- "3.9"
	- "3.10"
	- "3.11"
	- "3.12"
	steps:
	- uses: actions/checkout@v3
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}
	# Disable cache so that issues with new dependencies are found more easily
	# cache: 'pip'
	# cache-dependency-path: \|
	# dev_requirements.txt
	# setup.py
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install texlive-latex-extra texlive-pictures texlive-science texlive-fonts-recommended lmodern ghostscript
	python -m pip install --upgrade pip
	pip install -r dev_requirements.txt --upgrade
	sudo sed '/pattern=".PDF."/d' -i /etc/ImageMagick*/policy.xml
	- name: Run tests
	run: \|
	./testall.sh

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