switch to pydantic

Signed-off-by: Jess Frazelle <github@jessfraz.com>

generate/float.py.jinja2

@@ -0,0 +1,16 @@
+from typing import Any
+
+from pydantic import GetCoreSchemaHandler
+from pydantic_core import CoreSchema, core_schema
+
+
+class {{name}}(float):
+    """{{description}}"""
+    def __float__(self) -> float:
+        return self
+
+    @classmethod
+    def __get_pydantic_core_schema__(
+        cls, source_type: Any, handler: GetCoreSchemaHandler
+    ) -> CoreSchema:
+        return core_schema.no_info_after_validator_function(cls, handler(float))