Pass additional fields in one-time transaction requests

[garthbrantley]

PRs: #232, subscribepro/subscribepro-php#51

When no customer is logged in, SP payment method is enabled and user checks out with new CC:

Must pass these additional fields in the transaction request:

• creditcard_type
• creditcard_first_digits
• creditcard_last_digits
• billing_address

API docs:

• https://api-stage.subscribepro.com/docs/rest#post--services-v1-vault-tokens-{token}-authorize.{_format}
• https://api-stage.subscribepro.com/docs/rest#post--services-v1-vault-tokens-{token}-purchase.{_format}

[eugene-shab]

@garthbrantley i've create a fix for it - https://github.com/subscribepro/subscribepro-php/pull/51

[garthbrantley]

@eugene-shab This is tested working.

However, you did not update the dependency in the extension composer.json. Doing that now.