Use __new__ for datetime.time (#5530)

CONTRIBUTING.md

@@ -274,13 +274,13 @@ MAXYEAR: int
 MINYEAR: int
 
 class date:
-    def __init__(self, year: int, month: int, day: int) -> None: ...
+    def __new__(cls: Type[_S], year: int, month: int, day: int) -> _S: ...
     @classmethod
-    def fromtimestamp(cls, timestamp: float) -> date: ...
+    def fromtimestamp(cls: Type[_S], __timestamp: float) -> _S: ...
     @classmethod
-    def today(cls) -> date: ...
+    def today(cls: Type[_S]) -> _S: ...
     @classmethod
-    def fromordinal(cls, ordinal: int) -> date: ...
+    def fromordinal(cls: Type[_S], n: int) -> _S: ...
     @property
     def year(self) -> int: ...
     def replace(self, year: int = ..., month: int = ..., day: int = ...) -> date: ...