Add Github Actions CI - mypy, pytest, black #1

	name: Python CI

	on:
	pull_request:
	push:
	branches: [main]

	jobs:
	build:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Set up Python 3.9
	uses: actions/setup-python@v2
	with:
	python-version: 3.9

	- name: Install Poetry
	run: curl -sSL https://install.python-poetry.org \| python3 -

	- name: Install dependencies
	run: poetry install

	- name: Run mypy
	run: poetry run mypy

	- name: Run pytest
	run: poetry run pytest

	- name: Check with black
	run: poetry run black --check .

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