Update changelog and prepare for release. (#509)

Co-authored-by: Peter Doggart <[email protected]>

Author: peter-doggart

CHANGELOG.rst

@@ -36,6 +36,7 @@ Bug Fixes
 ::
 
    * Fix failing pypy python setup in github actions
+   * Fix compatibility with upcoming release of Flask 2.3+. (#485) [jdieter]
 
 .. _section-1.0.2:
 1.0.2

flask_restx/api.py

@@ -685,7 +685,7 @@ def handle_error(self, e):
         # client if a handler is configured for the exception.
         if (
             not isinstance(e, HTTPException)
-            and current_app.propagate_exceptions
+            and current_app.config.get("PROPAGATE_EXCEPTIONS", False)
             and not isinstance(e, tuple(self._own_and_child_error_handlers.keys()))
         ):