OscBundleBuilder's contents now have correct typing

Author: fraser.todd

pythonosc/osc_bundle_builder.py

@@ -25,9 +25,9 @@ def __init__(self, timestamp: int) -> None:
                        seconds since the epoch in UTC or IMMEDIATELY.
         """
         self._timestamp = timestamp
-        self._contents: List[osc_bundle.OscBundle] = []
+        self._contents: List[osc_bundle.OscBundle | osc_message.OscMessage] = []
 
-    def add_content(self, content: osc_bundle.OscBundle) -> None:
+    def add_content(self, content: osc_bundle.OscBundle | osc_message.OscMessage) -> None:
         """Add a new content to this bundle.
 
         Args: