Add precise values for enum members where possible (#11299)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Co-authored-by: Alex Waygood <alex.waygood@gmail.com>

stdlib/uuid.pyi

@@ -7,9 +7,9 @@ from typing_extensions import TypeAlias
 _FieldsType: TypeAlias = tuple[int, int, int, int, int, int]
 
 class SafeUUID(Enum):
-    safe: int
-    unsafe: int
-    unknown: None
+    safe = 0
+    unsafe = -1
+    unknown = None
 
 class UUID:
     def __init__(