fix: mypy type annotation warnings

XXX: is the connect_write_pipe warning legitimate?

pynvim/msgpack_rpc/event_loop/asyncio.py

@@ -23,7 +23,7 @@
 
 loop_cls = asyncio.SelectorEventLoop
 if os.name == 'nt':
-    from asyncio.windows_utils import PipeHandle
+    from asyncio.windows_utils import PipeHandle  # type: ignore[attr-defined]
     import msvcrt
 
     # On windows use ProactorEventLoop which support pipes and is backed by the
@@ -114,7 +114,7 @@ def _connect_stdio(self) -> None:
             )
         else:
             pipe = os.fdopen(rename_stdout, 'wb')
-        coroutine = self._loop.connect_write_pipe(self._fact, pipe)
+        coroutine = self._loop.connect_write_pipe(self._fact, pipe)  # type: ignore[assignment]
         self._loop.run_until_complete(coroutine)
         debug("native stdout connection successful")