king: update stackage resolver to lts-16.15
king: update stackage resolver to lts-16.15

This allows us to drop flat/urbit-hob as they're now in the package set,
web3/vinyl need to be added to account for urbit-azimuth's dependencies.

ngzax/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,urbit/urbit