Add support for API versioning

import {
  createClient
} from 'next-sanity'

const config = {
  dataset: process.env.NEXT_PUBLIC_SANITY_DATASET || 'production',
  projectId: process.env.NEXT_PUBLIC_SANITY_PROJECT_ID,
  useCdn: process.env.NODE_ENV === 'production',
  apiVersion: '2021-03-25'
}

export const sanityClient = createClient(config)