py 2.7 3.x fix

src/wormhole/wormhole.py

@@ -236,6 +236,8 @@ def create(appid, relay_url, reactor, # use keyword args for everything else
         wormhole_version = list(versions.values())[0] or ""
     else:
         wormhole_version = versions or ""
+    #workaround for py2.7, py3.X
+    if sys.version_info < (3, 0):
         wormhole_version = wormhole_version.decode('unicode-escape')
     implementation = "python"
     b = Boss(w, side, relay_url, appid, wormhole_versions, wormhole_version,