Correct problem due to math.gcd and lcm which were introducted in py3.9 #27

	# This is a basic workflow to help you get started with Actions

	name: Tests

	# Controls when the workflow will run
	on:
	push:
	paths:
	- src/**
	- tests/**
	branches: [ main ]
	pull_request:
	branches: [ main ]
	workflow_dispatch:

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest]
	python-version: ['3.7', '3.8', '3.9', '3.10']
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v2
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	python -m pip install tox tox-gh-actions

	- name: Run with tox
	run: tox

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