- Add support for new UK Payment Initiation product ([195](https://github.com/plaid/plaid-python/pull/195))
- `/payment_initiation/recipient/create`
- `/payment_initiation/recipient/get`
- `/payment_initiation/recipient/list`
- `/payment_initiation/payment/create`
- `/payment_initiation/payment/token/create`
- `/payment_initiation/payment/get`
- `/payment_initiation/payment/list`