Security update for python-Django

Open Source Vulnerabilities openSUSE-SU-2019:1839-1

This update for python-Django fixes the following issues: Security issues fixed: - CVE-2019-11358: Fixed prototype pollution. - CVE-2019-12308: Fixed XSS in AdminURLFieldWidget (bsc#1136468) - CVE-2019-12781: Fixed incorrect HTTP detection with reverse-proxy connecting via HTTPS (bsc#1139945). - CVE-2019-14232: Fixed denial-of-service possibility in ``django.utils.text.Truncator`` (bsc#1142880). - CVE-2019-14233: Fixed denial-of-service possibility in ``strip_tags()`` (bsc#1142882). - CVE-2019-14234: Fixed SQL injection possibility in key and index lookups for ``JSONField``/``HStoreField`` (bsc#1142883). - CVE-2019-14235: Fixed potential memory exhaustion in ``django.utils.encoding.uri_to_iri()`` (bsc#1142885). Non-security issues fixed: - Fixed a migration crash on PostgreSQL when adding a check constraint with a contains lookup on DateRangeField or DateTimeRangeField, if the right hand side of an expression is the same type.