Using plugins with Actions on Google client library v2

v2-plugins.js

const { dialogflow } = require('actions-on-google')
const { randomize, Randomization } = require('randomize')

const app = dialogflow()
  .use(randomize)

app.intent('tell.greeting', conv => {
  conv.ask(`The last thing I told you was ${conv.randomize.last}`)
  conv.ask(new Randomization(
    'How are you?',
    'Are you having a good day?',
  ))
})