Add Pydantic classifier (#5847)

Author: hramezani

setup.py

@@ -118,6 +118,7 @@ def extra(self):
         'Environment :: Console',
         'Environment :: MacOS X',
         'Framework :: Hypothesis',
+        'Framework :: Pydantic',
         'Topic :: Software Development :: Libraries :: Python Modules',
         'Topic :: Internet',
     ],