OF-2031: Update dom4j to version 2.1.3
OF-2031: Update dom4j to version 2.1.3

Version 2.1.3 fixes a vulnerability identified as CVE-2020-10683

guusdk/Openfire,igniterealtime/Openfire,guusdk/Openfire,akrherz/Openfire,GregDThomas/Openfire,igniterealtime/Openfire,guusdk/Openfire,GregDThomas/Openfire,akrherz/Openfire,GregDThomas/Openfire,akrherz/Openfire,igniterealtime/Openfire,igniterealtime/Openfire,akrherz/Openfire,GregDThomas/Openfire,akrherz/Openfire,guusdk/Openfire,igniterealtime/Openfire,guusdk/Openfire,GregDThomas/Openfire