Fixed return types of 'value' and 'key' in Morsel.

Author: b9788213

stdlib/http/cookies.pyi

@@ -21,11 +21,11 @@ class CookieError(Exception): ...
 
 class Morsel(dict[str, Any], Generic[_T]):
     @property
-    def value(self) -> str: ...
+    def value(self) -> str | None: ...
     @property
     def coded_value(self) -> _T: ...
     @property
-    def key(self) -> str: ...
+    def key(self) -> str | None: ...
     def __init__(self) -> None: ...
     def set(self, key: str, val: str, coded_val: _T) -> None: ...
     def setdefault(self, key: str, val: str | None = None) -> str: ...