explicitly wrap flush LocalFileOpener (#1070)

* explicitly wrap flush and name of LocalFileOpener

* revert explicit wrapping of local name

Co-authored-by: Peter Barmettler <peter.barmettler@raccoonworks.ch>

fsspec/implementations/local.py

@@ -364,6 +364,9 @@ def closed(self):
     def fileno(self):
         return self.raw.fileno()
 
+    def flush(self) -> None:
+        self.f.flush()
+
     def __iter__(self):
         return self.f.__iter__()