[App] Finally, time mocking in tests seems to be working! 😅

I had to add a flag in the `_timer` module that allows us to completely disable the  "skip" feature of Timers, though - but it shouldn't cause too much trouble 🤞

tests/test_animator.py

@@ -177,12 +177,12 @@ class MockAnimator(Animator):
         self._time = 0.0
         self._on_animation_frame_called = False
 
-    def get_time(self):
-        return self._time
-
     def on_animation_frame(self):
         self._on_animation_frame_called = True
 
+    def _get_time(self):
+        return self._time
+
 
 def test_animator():