MAINT: Bump version.

Author: Scott Sanderson

setup.py

@@ -28,7 +28,7 @@ def install_requires():
 
 setup(
     name="python-interface",
-    version="1.5.5",
+    version="1.6.0",
     description="Pythonic Interface definitions",
     author="Scott Sanderson",
     author_email="[email protected]",