style: A couple tweaks after code review

Author: dbanty

Diff for: openapi_python_client/schema/openapi_schema_pydantic/components.py

@@ -33,9 +33,7 @@ class Components(BaseModel):
     headers: Optional[Dict[str, Union[Header, Reference]]] = None
     securitySchemes: Optional[Dict[str, Union[SecurityScheme, Reference]]] = None
     links: Optional[Dict[str, Union[Link, Reference]]] = None
-
     callbacks: Optional[Dict[str, Union[Callback, Reference]]] = None
-    """An object to hold reusable [Callback Objects](#callbackObject)."""
 
     class Config:  # pylint: disable=missing-class-docstring
         extra = Extra.allow

Diff for: openapi_python_client/schema/openapi_schema_pydantic/encoding.py

@@ -6,6 +6,8 @@
 
 if TYPE_CHECKING:
     from .header import Header
+else:
+    Header = "Header"  # pylint: disable=invalid-name
 
 
 class Encoding(BaseModel):
@@ -17,7 +19,7 @@ class Encoding(BaseModel):
     """
 
     contentType: Optional[str] = None
-    headers: Optional[Dict[str, Union["Header", Reference]]] = None
+    headers: Optional[Dict[str, Union[Header, Reference]]] = None
     style: Optional[str] = None
     explode: bool = False
     allowReserved: bool = False