Bump smmap version to 5.0.3 for Python 3.13 metadata release

Co-authored-by: Byron <63622+Byron@users.noreply.github.com>

Author: Copilot

smmap/__init__.py

@@ -3,7 +3,7 @@
 __author__ = "Sebastian Thiel"
 __contact__ = "byronimo@gmail.com"
 __homepage__ = "https://github.com/gitpython-developers/smmap"
-version_info = (5, 0, 2)
+version_info = (5, 0, 3)
 __version__ = '.'.join(str(i) for i in version_info)
 
 # make everything available in root package for convenience