Release 0.6.3 (#359)

Co-authored-by: bogdan kyryliuk <bogdankyryliuk@dropbox.com>

Author: bkyryliuk

pyhive/__init__.py

@@ -1,3 +1,3 @@
 from __future__ import absolute_import
 from __future__ import unicode_literals
-__version__ = '0.6.2'
+__version__ = '0.6.3'