fix tying issues #175

	name: Mypy Check

	on:
	push:
	paths:
	- 'pronotepy/**.py'
	branches:
	- master
	workflow_dispatch:


	jobs:
	run_mypy_check:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v1
	with:
	python-version: '3.7'
	- name: Install dev dependencies
	run: python -m pip install -r requirements.txt
	- name: Run mypy
	run: python -m mypy pronotepy --pretty --disallow-untyped-defs --disallow-incomplete-defs

Provide feedback