Update pybind11-stubgen to 2.5.x

Author: auscompgeek

setup.cfg

@@ -35,7 +35,7 @@ install_requires =
     typing-extensions
     pyyaml >= 5.1
     patch == 1.*
-    pybind11-stubgen ~= 2.3.3
+    pybind11-stubgen ~= 2.5.1
     delocate; platform_system == 'Darwin'
     distro; platform_system == 'Linux'
 python_requires = >=3.8