cc @willbouch since you asked to be tagged if I opened this PR.
The /store/shipping-options is one of only 2 store endpoints to not allow custom `fields` to be passed(other one is /store/returns if you guys want to add it to the backlog). This PR fixes that so that custom linked models can also be retrieved.
Note: This fix reveals a bug in the next.js starter
eac359cc8d/src/lib/data/fulfillment.ts (L23-L24)
`fields` was previously ignored, now it errors since it tries to parse the misspelled "fulfllment"(the i is missing). It worked before since both fields are already defined by default inside the workflow. So the `fields` line is totally redundant and should be removed(ideally before merging this).
Maybe in the next release notes it should also warn users to remove it for those that already have a modified copy of the starter.
458dd04bbf