Merge pull request #71 from FriedrichFroebel/warnings #37

	name: CI

	on:
	- push
	- pull_request

	jobs:
	main:
	strategy:
	matrix:
	python: ['3.8', '3.9', '3.10', '3.11']
	runs-on: ubuntu-latest
	name: Python ${{ matrix.python }}
	steps:
	- uses: actions/checkout@v3
	- name: set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python }}
	- name: apt update
	run:
	sudo apt-get update
	- name: apt install GCC
	run:
	sudo apt-get install gcc
	- name: prepare pip
	run:
	python -m pip install --upgrade pip wheel setuptools numpy
	- name: install apt deps
	run:
	sudo apt-get install
	libjpeg-dev
	libtiff-dev
	libgtk-3-dev
	libgtk3.0
	autoconf
	build-essential
	libpng16-16
	libpng-dev
	dpkg-dev
	build-essential
	- name: build and install Gamera
	run: \|
	python -m pip install --verbose .
	# The directory seems to be required, otherwise we get some errors:
	# gamera.gamera_xml.XMLError: Cannot create a file at '/home/runner/work/gamera-4/gamera-4/tmp'
	- name: prepare tests
	run: \|
	python -m pip install --upgrade pytest docutils pygments
	mkdir tmp
	- name: run tests
	run:
	pytest

Provide feedback