fix(types): resolve arrays correctly with multi-property resolver

[LiamMartens]

This sort of resolves #102 - the GROQ was already generated correctly, but the multi property resolver typing wasn't accounting for array types. Added a test and type logic for this to work:

const [query] = movie
  .map(h => ({ cast: h.castMembers.resolveIn(['name', 'otherfield']).use() }))
  .pick(['title', 'cast'])
  .use()