adding more python versions #39

	# Copyright 2021 The banded_matrices Contributors.
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	name: Tests

	on:
	push:
	release:
	types:
	- created


	jobs:
	check-and-test:
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	python-version: [3.7, 3.8, 3.9, 3.10, 3.11]
	poetry-version: [1.1.6]
	name: Python-${{ matrix.python-version }}
	steps:
	- uses: actions/checkout@v2
	- uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}
	# ------------ Install poetry
	- name: Setup pip/poetry
	run: \|
	pip install -U pip poetry twine
	poetry config virtualenvs.create false
	# ------------ install tools
	- name: Install building tools
	run: \|
	sudo apt-get install build-essential
	sudo apt-get install cmake g++-11
	# ------------ build and install package
	- name: Install package
	run: poetry install
	# ------------ run tests
	- name: Run tests
	run: poetry run task test

Provide feedback