Update Readme

Author: NaiboWang

setup.py

@@ -6,7 +6,7 @@
 
 setuptools.setup(
     name="commandline_config",
-    version="2.2.2",
+    version="2.2.3",
     author="Naibo Wang",
     author_email="[email protected]",
     description="A library for users to write (experiment in research) configurations in Python Dict or JSON format, while can read parameters from the command line",