Feature request. Add an option to GZIP service-worker.js file.

The issue I'm experiencing is pretty annoying. I'm trying to optimize my first byte, by turning off compression, and gziping everything by webpack with CompressionPlugin. The issue is that it doesn't compress service-worker.js produced by sw-precache-webpack-plugin.

I understand the reason why: service-worker.js should cache all chunks produced by webpack after CompressionPlugin compression.

This is why I think it should be an option in sw-precache-webpack-plugin itself.

Thank you)