Prepare core 1.6.0 on master (#11610)

Author: lmazuel

sdk/core/azure-core/CHANGELOG.md

@@ -1,7 +1,7 @@
 
 # Release History
 
-## 1.5.1 (Unreleased)
+## 1.6.0 (Unreleased)
 
 ### Bug fixes
 
@@ -10,6 +10,9 @@
 ### Features
 
 - Added support for changesets as part of multipart message support #10485
+- Add AsyncLROPoller in azure.core.polling #10801
+- Add get_continuation_token/from_continuation_token/polling_method methods in pollers (sync and async) #10801
+- HttpResponse objects are now pickable #10801
 
 ## 1.5.0 (2020-05-04)
 

sdk/core/azure-core/azure/core/_version.py

@@ -9,4 +9,4 @@
 # regenerated.
 # --------------------------------------------------------------------------
 
-VERSION = "1.5.1"
+VERSION = "1.6.0"