Add file-like object to docs (#17492)

Author: rvernica

pandas/io/feather_format.py

@@ -41,8 +41,7 @@ def to_feather(df, path):
     Parameters
     ----------
     df : DataFrame
-    path : string
-        File path
+    path : string file path, or file-like object
 
     """
     path = _stringify_path(path)
@@ -92,8 +91,7 @@ def read_feather(path, nthreads=1):
 
     Parameters
     ----------
-    path : string
-        File path
+    path : string file path, or file-like object
     nthreads : int, default 1
         Number of CPU threads to use when reading to pandas.DataFrame