build: upgrade python client version to prepare next release (#4435)

Signed-off-by: ZhangJian He <[email protected]>

Author: hezhangjian

stream/clients/python/setup.py

@@ -19,7 +19,7 @@
 
 name = 'apache-bookkeeper-client'
 description = 'Apache BookKeeper client library'
-version = '4.17.0'
+version = '4.18.0'
 # Should be one of:
 # 'Development Status :: 3 - Alpha'
 # 'Development Status :: 4 - Beta'