Topic/custom blueprinters with schema

[breezykermo]

A low-touch way to provide some extra type transformations for deeprows endpoints, added as I wanted more flexibility over the types returned from the endpoint for a project. My config looks like this

import BP, { deeprowsWithSchema } from './lib/blueprinters'

const schema = {
  'Departure': d => new Date(d),
  'Arrival': d => new Date(d),
  'Arrival Error': n => n === '' ? null : Number(n),
  'Estimated cargo': n => n === '' ? null : Number(n)
}

export default {
  gsheets: [
    {
      name: 'mysheet',
      id: 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx',
      tabs: {
        'data': deeprowsWithSchema('numbered', schema)
      }
    }
  ]
}