Information about upgrading GHC and libraries #893

Hi!

I'm experimenting with compiling PureScript via wasm, and the current version of base that PureScript uses is ahead of the one in the terrorjack docker image. A lot of the libraries are also a couple versions ahead. I was wondering if there were any instructions on how to update GHC to get a newer base and how to update the packaged libraries? If this is too challenging or a non-goal of the project then please feel free to close the issue, but if it's doable, it'd be helpful to know how. Thanks!