Upgrade to PureScript v0.14

[toastal]

Currently this is still pointed at 0.13.8, but 0.14.x has been out for a while. It appears to work, but a banner comment appears at the top of the file saying it's generated with PureScript 0.13.8 which raises some red flags to me.

[coot]

Could you open a PR?

[toastal]

I would if I felt comfortable with getting Haskell tooling running, which I do not. If it were using Nix I could probably manage.