mypy: ignore imports of python-telegram-bot
```
location_guessing_game_telegram_bot/__init__.py:27: error: Skipping analyzing 'telegram.ext': found module but no type hints or library stubs
location_guessing_game_telegram_bot/__init__.py:27: note: See https://mypy.readthedocs.io/en/latest/running_mypy.html#missing-imports
location_guessing_game_telegram_bot/__init__.py:27: error: Skipping analyzing 'telegram': found module but no type hints or library stubs
location_guessing_game_telegram_bot/__init__.py:28: error: Skipping analyzing 'telegram.update': found module but no type hints or library stubs
```