This update for python-httplib2 fixes the following issues:

- Update to version 0.19.0 (bsc#1182053).
- CVE-2021-21240: Fixed regular expression denial of service via malicious header (bsc#1182053).
- CVE-2020-11078: Fixed unescaped part of uri where an attacker could change request headers and body (bsc#1182053).