Bump aks-preview version to 0.5.11 (Azure#3343)

Author: JunSun17

src/aks-preview/HISTORY.md

@@ -2,6 +2,11 @@
 
 Release History
 ===============
+0.5.11
++++++
+* Add get OS options support
+* Fix wrong behavior when enabling pod identity addon for cluster with addon enabled
+
 0.5.10
 +++++
 * Add `--binding-selector` to AAD pod identity add sub command

src/aks-preview/setup.py

@@ -8,7 +8,7 @@
 from codecs import open as open1
 from setuptools import setup, find_packages
 
-VERSION = "0.5.10"
+VERSION = "0.5.11"
 CLASSIFIERS = [
     'Development Status :: 4 - Beta',
     'Intended Audience :: Developers',