Fix more type issues

Author: pushfoo

arcade/sprite/base.py

@@ -149,7 +149,7 @@ def center_y(self, new_value: float):
         if new_value == position[1]:
             return
 
-        new_position = (position[0], new_value)
+        new_position = Vec2(position[0], new_value)
 
         self._position = new_position
         self._hit_box.position = new_position
@@ -188,7 +188,7 @@ def width(self, new_value: float):
             new_scale = Vec2(new_value / self._texture.width, self._scale[1])
             self._scale = new_scale
             self._hit_box.scale = new_scale
-            self._size = (new_value, size[1])
+            self._size = Vec2(new_value, size[1])
 
             self.update_spatial_hash()
             for sprite_list in self.sprite_lists: