feat: Marked python 3.13 as supported.

Author: vogoltsov

setup.py

@@ -31,6 +31,7 @@
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
         'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
         'Framework :: Robot Framework :: Library',
     ],
     keywords='testing testautomation robotframework docker docker-compose',