fix: update build function type hint to use value_type for improved type safety

Author: bubaley

fastapi_mason/lookups.py

@@ -28,7 +28,7 @@ def build(cls, item_id: T = Path(..., alias=lookup_url_kwarg)) -> 'BaseLookup[T]
 
 
 def build_lookup_class(class_name: str, lookup_url_kwarg: str, value_type: Type[T]) -> Type[BaseLookup[T]]:
-    def build(cls, value: T = Path(alias=lookup_url_kwarg)) -> BaseLookup[T]:
+    def build(cls, value: value_type = Path(alias=lookup_url_kwarg)) -> BaseLookup[T]:  # type: ignore
         return cls(**{'value': value})
 
     class_dict = {