Fixed: Correctly add optional type annotations #197

	name: Run pytest

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.9' # Follow the min version in pyproject.toml

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install pytest
	pip install -e .

	- name: Run tests
	env:
	PYTHONPATH: ${{ github.workspace }}
	run: \|
	pytest

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