Should `sources` field be removed from `spago.dhall`?

[milesfrain]

FYI, I spotted this comment by @f-f in an old issue that came-up when working in this cookbook:

The new Spago does not have sources anymore

purescript/spago#648 (comment)

Don't know if this new spago is released yet. Seems like the cookbook recipes will need to updated.

purescript-cookbook/recipes/HelloLog/spago.dhall

Line 4 in d6256a7

, sources = [ "recipes/HelloLog/src/**/*.purs" ]

[f-f]

It's released as spago@next, and on the way to an alpha release, at which point it is going to be the default when folks install Spago.
The old Spago codebase is effectively deprecated.
So I guess it is a good moment to update the cookbook - docs for the new Spago are not published yet, so it's probably best to wait for that.