[build] Set compact option to true explicitly
Created by: epiclabsDASH
Set compact
option of babel to true explicitly to avoid the following warning message during compilation:
[BABEL] Note: The code generator has deoptimised the styling of "D:/nginx/html/dash.js-2.0/src/streaming/MediaPlayer.js" as it exceeds the max of "100KB".
Fix #2244 (closed)