Update note visuals.

rhythm_game/note/visual/tap/tap_note.gd

@@ -2,8 +2,13 @@ class_name TapNote extends NoteVisual
 
 var id: int = -1
 
+#TODO: Add all the members needed so a note can be updated.
+
 func reset() -> void:
 	id = -1
 
 func in_use() -> bool:
 	return id >= 0
+
+func update(beat: float) -> void:
+	pass