Git commits in Moodle 3.3.x by Łukasz Szeremeta

commit c9ef8771cedacc145eb3e2d19a82d86a73033310
Author: Łukasz Szeremeta <l.szeremeta.dev@gmail.com>
Date:   Tue, 03 Apr 2018 05:54:18 +0800
Tag:    v3.3.6

MDL-61827 auth: Change Facebook Graph API v2.8 to v.2.12 in OAuth2