Fix Mypy errors when ran with "--strict" mode

loguru/__init__.pyi

@@ -148,7 +148,7 @@ class _GeneratorContextManager(ContextManager[_T], Generic[_T]):
 
 Catcher = NewType("Catcher", _GeneratorContextManager[None])
 Contextualizer = NewType("Contextualizer", _GeneratorContextManager[None])
-AwaitableCompleter = Awaitable
+AwaitableCompleter = Awaitable[None]
 
 class Level(NamedTuple):
     name: str
@@ -404,7 +404,7 @@ class Logger:
     ) -> None: ...
     @overload
     def log(__self, __level: Union[int, str], __message: Any) -> None: ...
-    def start(self, *args: Any, **kwargs: Any): ...
-    def stop(self, *args: Any, **kwargs: Any): ...
+    def start(self, *args: Any, **kwargs: Any) -> int: ...
+    def stop(self, *args: Any, **kwargs: Any) -> None: ...
 
 logger: Logger

tests/typesafety/test_logger.yml

@@ -90,9 +90,10 @@
 
 - case: async_sink_options
   main: |
+    import loguru
     from loguru import logger
     import asyncio
-    async def sink(m):
+    async def sink(m: loguru.Message) -> None:
       pass
     logger.add(
       sink,
@@ -108,11 +109,11 @@
   main: |
     from loguru import logger
     awaitable = logger.complete()
-    async def func():
+    async def func() -> None:
       await awaitable
     reveal_type(awaitable)
   out: |
-    main:5: note: Revealed type is "typing.Awaitable[Any]"
+    main:5: note: Revealed type is "typing.Awaitable[None]"
 
 - case: catch_as_decorator_with_parentheses
   main: |

tox.ini

@@ -42,4 +42,5 @@ testpaths =
     tests
 
 [mypy]
+strict = true
 mypy_path = $MYPY_CONFIG_FILE_DIR/loguru