Updated the year to 2020 for Debian/Ubuntu copyright file

Author: surbhat1595

packaging/deb-in/copyright.in

@@ -4,7 +4,7 @@ Upstream-Contact: MySQL Release Engineering <[email protected]>
 Source: https://dev.mysql.com/doc/connector-cpp/en/
 
 Files: *
-Copyright: 2008, 2019, Oracle and/or its affiliates. All rights reserved.
+Copyright: 2008, 2020, Oracle and/or its affiliates. All rights reserved.
 License: @DEB_LICENSENAME@
  This is a release of MySQL Connector/C++, the C++ interface for communicating
  with MySQL servers.