Add types to ticker on message callback functions

[NithinBiliya]

Currently the ticker on message callback functions do not have defined types. Can we get the added?

     ...
     ticker.connect();
     ticker.on('ticks', onTicks);
     function onTicks(ticks: any[]): void {
         console.log("Ticks", ticks);
     }
     ...

ref

Most important is the shape of ticks. Is this type already available in the library?