SNOW-66908: Bumping up version to 1.7.6

Author: smtakeda

DESCRIPTION.rst

@@ -9,6 +9,11 @@ Source code is also available at: https://github.com/snowflakedb/snowflake-conne
 Release Notes
 -------------------------------------------------------------------------------
 
+- v1.7.6 (February 08,2019)
+
+    - Adjusted pyasn1 and pyasn1-module requirements for Python Connector
+    - Added idna to setup.py. made pyasn1 optional for Python2
+
 - v1.7.5 (January 25, 2019)
 
     - Incorporate "kwargs" style group of key-value pairs in connection's "execute_string" function.

version.py

@@ -1,3 +1,3 @@
 # Update this for the versions
 # Don't change the forth version number from None
-VERSION = (1, 7, 5, None)
+VERSION = (1, 7, 6, None)