Improve: make peer checks more tolerant

[kellymears]

Type of change

• MINOR: feature

Dependencies added

• none

Details

Some people were having trouble with tailwindcss and eventually we figured out it was because tailwindcss was installed as a non dev dep, and @roots/bud-tailwindcss would exit early if it didn't see it in devDependencies specifically. There is similar behavior from most of the extensions that require additional packages to be installed as peers.

I don't really think it should matter to bud how the project structures its dependencies and so I wanted to check in both places before early exit. This requires a lot of annoying typing:

app.discovery.has('devDependencies.tailwindcss') && app.discovery.has('dependencies.tailwindcss') && doThing()

This change addresses that with a bud.discovery.hasPeerDependencies . It takes a package name and returns a boolean if the dependency is found in either the project level devDependencies or dependencies.

app.discovery.hasPeerDependency('tailwindcss') && doThing()

This change also makes the @roots/sage preset a lot more flexible in terms of how it can be imported/required (aligning it with most of the other extensions).