bump up version to 0.2.3

Author: czheo

setup.py

@@ -2,7 +2,7 @@
 
 setup(
     name="syntax_sugar",
-    version="0.2.2",
+    version="0.2.3",
     url='https://github.com/czheo/syntax_sugar_python',
     description="add syntactic sugar to Python",
     author="czheo",