Handle missing typing.override (#204)

Signed-off-by: Michel Hidalgo <mhidalgo@theaiinstitute.com>

Author: mhidalgo-rai

synchros2/synchros2/node.py

@@ -6,8 +6,7 @@
 try:
     from typing import override  # type: ignore[attr-defined]
 except ImportError:
-    from typing_extensions import override  # type: ignore[import]
-
+    override = lambda func: func  # noqa
 
 from rclpy.callback_groups import CallbackGroup
 from rclpy.clock import Clock

synchros2/synchros2/time.py

@@ -7,7 +7,7 @@
 try:
     from typing import override  # type: ignore[attr-defined]
 except ImportError:
-    from typing_extensions import override  # type: ignore[import]
+    override = lambda func: func  # noqa
 
 from rclpy.context import Context
 from rclpy.duration import Duration