xF2 Eklenti Change Content Owner or Date 2.0.18

• Change: Require Standard Library to make the add-on work on older version of XF (#102)
• Change: Increase PHP version requirement to 7.1 to match that of Standard Library add-on (#102)
• Change: Increase XF version requirement to 2.2 to match that of Standard Library add-on (#102)
• Fix: Template modification for thread_edit template fails to apply on XF 2.3 (#103)
• Fix: Time input width still not wide enough to show AM/PM (#104)