open() accepts "rb" (#484)

fix #407

---------

Co-authored-by: allburov <allburov@gmail.com>

Author: daveswork

artifactory.py

@@ -2104,7 +2104,7 @@ def open(self, mode="r", buffering=-1, encoding=None, errors=None, newline=None)
         HTTPResponse, as if it was a regular filesystem object.
         The only difference is that this object doesn't support seek()
         """
-        if mode != "r" or buffering != -1 or encoding or errors or newline:
+        if mode not in {"r", "rb"} or buffering != -1 or encoding or errors or newline:
             raise NotImplementedError("Only the default open() arguments are supported")
 
         return self._accessor.open(self)