Version 3.9.4

* Do not unsynchronize frames twice
* npm audit fix

Author: aadsm

dist/jsmediatags.js

@@ -1157,7 +1157,7 @@ function () {
 
         var unsyncData;
 
-        if (flags && flags.format.unsynchronisation) {
+        if (flags && flags.format.unsynchronisation && !id3header.flags.unsynchronisation) {
           frameData = this.getUnsyncFileReader(frameData, frameDataOffset, frameSize);
           frameDataOffset = 0;
           frameSize = frameData.getSize();