Bump to latest stable version of the 10.2.x branch. Besides many bug fixes the
following security related issues have been fixed:
- CVE-2018-3060
- CVE-2018-3064
- CVE-2018-3063
- CVE-2018-3058
- CVE-2018-3066
Release notes: https://mariadb.com/kb/en/library/mariadb-10217-release-notes/