Reduce binary size

[dpwiz]

For a cheap 3x reduction, add to stack.yaml:

ghc-options:
  "$everything": -split-sections

Throw in upx -9 for extra 5x shrinking.

[rmehri01]

@dpwiz Oh okay cool I didn't know about this, thanks!

[rmehri01]

I tried it locally with -split-sections on macOS and also got the same as @soywod:

ghc: on the commandline: -split-sections is not useful on this platform since it always uses subsections via symbols.

This was fixed here so I could up the ghc version but I think it would need to be on Stackage nightly, any suggestions?

[rmehri01]

I'm getting this error with upx on macOS (both locally and on GitHub actions) so I guess I'm going to have to hold off on this for a little bit.