Add support for stickers

Fix #130

src/neochatroom.cpp

@@ -27,6 +27,7 @@
 #include "events/roomcanonicalaliasevent.h"
 #include "events/roommessageevent.h"
 #include "events/roompowerlevelsevent.h"
+#include "events/stickerevent.h"
 #include "events/typingevent.h"
 #include "jobs/downloadfilejob.h"
 #include "neochatconfig.h"
@@ -345,6 +346,9 @@ QString NeoChatRoom::eventToString(const RoomEvent &evt, Qt::TextFormat format,
             }
             return plainBody;
         },
+        [](const StickerEvent &e) {
+            return e.body();
+        },
         [this](const RoomMemberEvent &e) {
             // FIXME: Rewind to the name that was at the time of this event
             auto subjectName = this->user(e.userId())->displayname();