Update useMemo dependency array in index.tsx

reading {isReady} from the hook object return doesn't currently update, at least when using the audio-reference pass through option.

I went through the code, and the first thing I found was line 120 containing the dependency array for the useMemo calculation. I'm pretty sure the dependency array needs to include isReady.

src/index.tsx

@@ -117,7 +117,7 @@ function useWavesurferState(wavesurfer: WaveSurfer | null): {
       isPlaying,
       currentTime,
     }),
-    [isPlaying, currentTime],
+    [isPlaying, currentTime, isReady],
   )
 }