add option to control output jpeg quality

Thank you for this utility :-)

Question:

When I try to convert the image on your app
https://catdad-experiments.github.io/heic-app/

It takes in a 294KB heic image and outputs a 645KB image.

However, when I use the command line -

node bin < sample1.heic > sample1.jpg

sample1.jpg is 2.2 MB.

I guess quality is hardcoded to 1 ?

Any plans on giving an option to override it ?