[TOOLSLIBS-1830] 6.3.0 release prep (#206)

* release version 6.3.0 prep

* typo fix

Author: aschuman0

CHANGELOG

@@ -1,5 +1,11 @@
 # urbanairship changelog
 
+## 6.3.0
+
+- Adds Support for OAuth2 Authentication
+- Adds new client classes for BasicAuth, BearerTokenAuth, and OAuth
+- Deprecates the Airship client class in favor of the new client classes
+
 ## 6.2.0
 
 - Adds Support for iOS Live Activity and Android Live Update

README.rst

@@ -74,6 +74,7 @@ Web Push to a tag
 History
 =======
 
+* 6.3 Support for OAuth2 Authentication. Adds new clients module and class.
 * 6.0 Support for Bearer Token Authentication. Removes support for Python 2.
 * 5.0 Support for SMS and Email messages. See changelog for other updates.
 * 4.0 Support for Automation, removed Feedback

urbanairship/__about__.py

@@ -1 +1 @@
-__version__ = "6.2.0"
+__version__ = "6.3.0"