use beta pydantic if python 3.13

Author: lgray

pyproject.toml

@@ -34,7 +34,8 @@ dependencies = [
   "numpy >=1.13.3",
   "typing-extensions;python_version<'3.8'",
   "dataclasses;python_version<'3.7'",
-  "pydantic >=2.11.0b1",
+  "pydantic >=2.11.0b1;python_version>'3.12'",
+  "pydantic >=2;python_version<'3.13'",  
   "rich",
   "packaging",
 ]