pidgin/pidgin

Add Since tags for 2.13.0 new symbols.

2019-11-21, Elliott Sales de Andrade
742cbafea3b8
Add Since tags for 2.13.0 new symbols.
For information on translating Pidgin, libpurple, and Finch, please see
our wiki page at https://developer.pidgin.im/wiki/TipsForTranslators