feat: set python version to 3.9 #409

	name: CI Workflow

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	test:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v1
	- name: Set up Python 3.10
	uses: actions/setup-python@v4
	with:
	python-version: '3.10'
	- uses: actions/cache@preview
	with:
	path: ~/.cache/pypoetry/virtualenvs
	key: ${{ runner.os }}-poetry-${{ hashFiles(format('{0}{1}', github.workspace, '/poetry.lock')) }}
	restore-keys: \|
	${{ runner.os }}-poetry-
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip poetry
	poetry install
	pip install .
	- name: Test with pytest
	run: \|
	poetry run pytest test

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