Fix func not getting called in events (#107)

* Fix func not getting called in NewMessage event

* Call super filter in Raw filter

gramjs/events/Raw.ts

@@ -51,9 +51,6 @@ export class Raw extends EventBuilder {
                 return;
             }
         }
-        if (this.func) {
-            return this.func(event);
-        }
-        return event;
+        return super.filter(event);
     }
 }

gramjs/events/common.ts

@@ -127,6 +127,9 @@ export class EventBuilder {
                 return;
             }
         }
+        if (this.func && !this.func(event)) {
+            return;
+        }
         return event;
     }
 }