Add vendor prefix to initializer name
Add vendor prefix to initializer name

sijad/flarum-ext-mentions,sijad/flarum-ext-mentions,flarum/flarum-ext-mentions,flarum/flarum-ext-mentions,flarum/flarum-ext-mentions,flarum/mentions,sijad/flarum-ext-mentions,amdad/mentions,amdad/mentions,flarum/mentions