added versioning info to contributing #65

	# This workflow will install Python dependencies, run tests and lint with a single version of Python
	# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python

	name: Build and Test

	on:
	push:
	branches: [ "main", "..", "..-*" ]
	pull_request:
	branches: [ "main", "..", "..-*" ]

	permissions:
	contents: read

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- name: Set up Python 3.8
	uses: actions/setup-python@v3
	with:
	python-version: "3.8"
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	curl -sSL https://install.python-poetry.org \| python3 -
	poetry install
	- name: Lint with flake8
	run: \|
	# stop the build if there are Python syntax errors or undefined names
	poetry run flake8 cassini --count --select=E9,F63,F7,F82 --show-source --statistics
	# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
	poetry run flake8 cassini --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
	- name: Check formatting with Black
	run: \|
	poetry run black --check cassini
	- name: Test with pytest
	run: \|
	poetry run pytest --cov cassini --cov-report=xml
	- name: Typecheck with mypy
	run: \|
	poetry run mypy cassini
	- name: Upload coverage reports to Codecov
	uses: codecov/codecov-action@v3
	env:
	CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

Provide feedback