API Interface is backwards in example

[andrew-templeton]

https://github.com/CyberSource/cybersource-flex-samples-node/blob/master/express-microform/app.js#L85

^^^ Wrong, the right way is:

// note the FORMAT is a STRING as the first argument, and the encryptionType and targetOrigin must be object for SECOND argument
const getTokenizationToken = async () => new Promise((resolve, reject) =>
  new CybersourceRestApi.KeyGenerationApi(configuration()).generatePublicKey(
    'JWT',
    { encryptionType: 'RsaOaep256', targetOrigin: 'http://localhost:5000' },
    (error, data) => error ? reject(error) : resolve(data))
  )

getTokenizationToken().then(console.log).catch(console.error)