SNOW-88339: Bumped up version to 1.8.6

Author: sfc-gh-stakeda

DESCRIPTION.rst

@@ -9,6 +9,13 @@ Source code is also available at: https://github.com/snowflakedb/snowflake-conne
 Release Notes
 -------------------------------------------------------------------------------
 
+- v1.8.6(July 29,2019)
+   
+    - Reduce retries for OCSP from Python Driver
+    - Azure PUT issue: ValueError: I/O operation on closed file
+    - Add client information to USER-AGENT HTTP header - PythonConnector
+    - Better handling of OCSP cache download failure
+
 - v1.8.5(July 15,2019)
 
     - Drop Python 3.4 support for Python Connector

version.py

@@ -1,3 +1,3 @@
 # Update this for the versions
 # Don't change the forth version number from None
-VERSION = (1, 8, 5, None)
+VERSION = (1, 8, 6, None)