metadata.destroyStorage is not a function

[rhythnic]

v10.20.0

When passed a corestore, Hyperdrive throws an error when destroyStorage() is called. This error doesn't happen when Hyperdrive is passed an instance of random-access-storage.

Code to reproduce error:

import Hyperdrive from 'hyperdrive'
import storage from 'random-access-memory'
import process from 'process'
import {
  Client as HyperspaceClient,
  Server as HyperspaceServer
} from 'hyperspace'

async function main () {
  const server = new HyperspaceServer({ storage })
  await server.ready()
  const client = new HyperspaceClient()
  await client.ready()

  const drive = new Hyperdrive(client.corestore())
  drive.on('error', err => {
    console.error(err)
    process.exit(1)
  })
  await drive.promises.ready()
  await drive.promises.writeFile('/foo.svg', '<svg></svg>')
  await drive.promises.close()
  await drive.promises.destroyStorage()
  console.log('success!')
  await client.close()
  await server.stop()
}

main().catch(err => console.error(err))