Fixed mypy errors

game/game.py

@@ -8,6 +8,7 @@ from typing import Any, List, Type, Union, cast
 
 from dcs.action import Coalition
 from dcs.countries import Switzerland, UnitedNationsPeacekeepers, USAFAggressors
+from dcs.country import Country
 from dcs.mapping import Point
 from dcs.task import CAP, CAS, PinpointStrike
 from dcs.vehicles import AirDefence
@@ -189,7 +190,7 @@ class Game:
         )
 
     @property
-    def neutral_country(self):
+    def neutral_country(self) -> Type[Country]:
         """Return the best fitting country that can be used as neutral faction in the generated mission"""
         countries_in_use = [self.red.country_name, self.blue.country_name]
         if UnitedNationsPeacekeepers not in countries_in_use:

game/helipad.py

@@ -8,7 +8,7 @@ from game.utils import Heading
 
 
 class Helipad(PointWithHeading):
-    def __init__(self):
+    def __init__(self) -> None:
         super(Helipad, self).__init__()
         self.heading = Heading.from_degrees(0)
         self.occupied = False