Produces Angular Build Error "Unexpected token: punc ())"

[danouche93]

Hi,
thanks to your plugin, I successfully convert videos to mp4. My problems is when I run ng build --prod

Describe the bug
To identify where the error was, I used ng build --prod --named-chunks --verbose --build-optimizer=false --source-map and got this error:

ERROR in education-education-module-ngfactory.491f3b07ab6e60c37d72.js from UglifyJs Unexpected token: punc ()) [./node_modules/@ffmpeg/ffmpeg/src/createWorker.js:135,0][education-education-module-ngfactory.491f3b07ab6e60c37d72.js:1489,4]

To Reproduce
I use Angular CLI: 6.2.4
Node: 12.16.1
OS: win32 x64
Angular: 6.1.9
The error occured when running ng build --prod

Additional context
With some research on the internet, I see that several people had the same problem with differents plugins. The problem was that there are extra comma.
So I search in createWorker.js if there were extra comma and indeed there are.
On line 134:
jobId, // here is extra comma
On line 141:
jobId, // extra comma too
On line 192:
setLogging(true); , // extra comma too`

When I delete all of these extra comma, my project build successfully, please include this fix.

[jeromewu]

It should work in the latest version, please try again.
BTW, the comma is convention we used in this repository, so we won't remove it for angular if there is another workaround.