Fix one more missing bit

#30

Author: gordonwatts

setup.py

@@ -19,7 +19,7 @@
 extras_require['complete'] = sorted(set(sum(extras_require.values(), [])))
 
 setup(name="dataframe_expressions",
-      version='1.1.0b4',
+      version=version,
       packages=['dataframe_expressions'],
       scripts=[],
       description="Library to help with accumulating expressions",