docs: updated build badge in README #59

	# This workflow will install Python dependencies and run tests with a variety of Python versions
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
	# CUSTOM Modifications by Dominik Müller (2022)

	name: Python package

	on:
	push:
	branches: [ master, development ]
	pull_request:
	branches: [ master, development ]

	jobs:
	build:

	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: ['3.9', '3.10', '3.11']

	steps:
	- uses: actions/checkout@v2
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install package
	run: \|
	python -m pip install --upgrade pip
	python -m pip install pytest
	python -m pip install .
	- name: Test with pytest
	run: \|
	pytest -v

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