docs: release notes of 2.2.0

Author: weakish

changelog

@@ -1,3 +1,12 @@
+## [2.2.0] - 2019-10-24
+### Added
+- _clientOnline and _clientOffline hooks
+### Fixed
+- fix _merge_metadata by @jinke18
+- typo in object_.get parameter
+
+### Fixed
+
 ## [2.1.14] - 2019-07-05
 ### Fixed
 - dependency issues with requests and werkzeug

setup.py

@@ -25,7 +25,7 @@
 
 setup(
     name='leancloud',
-    version='2.1.14',
+    version='2.2.0',
     description='LeanCloud Python SDK',
     url='https://leancloud.cn/',
     author='asaka',