stdlib: Add several missing comparison methods (#7202)

stdlib/asyncio/events.pyi

@@ -55,6 +55,11 @@ class TimerHandle(Handle):
     if sys.version_info >= (3, 7):
         def when(self) -> float: ...
 
+    def __lt__(self, other: TimerHandle) -> bool: ...
+    def __le__(self, other: TimerHandle) -> bool: ...
+    def __gt__(self, other: TimerHandle) -> bool: ...
+    def __ge__(self, other: TimerHandle) -> bool: ...
+
 class AbstractServer:
     @abstractmethod
     def close(self) -> None: ...