Suppress Windows bytes API warning until it can be fixed. Ref #2016.

Author: jaraco

pytest.ini

@@ -13,3 +13,5 @@ filterwarnings =
     ignore:Setuptools will stop working on Python 2:UserWarning
     # Suppress weird RuntimeWarning.
     ignore:Parent module 'setuptools' not found while handling absolute import:RuntimeWarning
+    # Suppress use of bytes for filenames on Windows until fixed #2016
+    ignore:The Windows bytes API has been deprecated:DeprecationWarning