update setup and changelog

Author: sgandhi1311

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## 6.3.0
+  * Support allow_nan in message JSON output [#183](https://github.com/singer-io/singer-python/pull/183)
+
 ## 6.2.3
   * Default type for non-standard data types is string [#182](https://github.com/singer-io/singer-python/pull/182)
 

setup.py

@@ -4,7 +4,7 @@
 import subprocess
 
 setup(name="singer-python",
-      version='6.2.3',
+      version='6.3.0',
       description="Singer.io utility library",
       author="Stitch",
       classifiers=['Programming Language :: Python :: 3 :: Only'],