Added missing classifiers for latest versions of python

Author: Sylvain MARIE

setup.cfg

@@ -28,6 +28,9 @@ classifiers =
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Framework :: Pytest
 
 [options]