Consider switching to terser

[gaearon]

This thread is worrying.

https://mobile.twitter.com/devongovett/status/1013127516943314944

Far from the first time I'm seeing issues with uglify-es btw.

[jeremy-coleman]

https://github.com/TrySound/rollup-plugin-terser

[Timer]

We've switched.