SUSE-SU-2020:0854-1 Security update for python3

This update for python3 fixes the following issue: - CVE-2019-18348: Fixed a CRLF injection via the host part of the url passed to urlopen. Now an InvalidURL exception is raised bsc1155094. - CVE-2019-9674: Improved the documentation to reflect the dangers of zip-bombs bsc1162825. - CVE-2020-8492...