Add support for ssl connection with SNI

[UnamedRus]

Describe the bug
It looks like that driver doesn't support SNI, so it can't connect to clickhouse server behind proxy with SNI.

To Reproduce
https://docs.python.org/3/library/ssl.html

Since Python 3.2 and 2.7.9, it is recommended to use the SSLContext.wrap_socket() of an SSLContext instance to wrap sockets as SSLSocket objects. The helper functions create_default_context() returns a new context with secure default settings. The old ssl.wrap_socket() function is deprecated since it is both inefficient and has no support for server name indication (SNI) and hostname matching.

clickhouse-driver/clickhouse_driver/connection.py

Line 225 in d76f38c

sock = ssl.wrap_socket(sock, **ssl_options)

[xzkostyan]

Hi.

Fix was merged into master branch.