Add more card brands to PaymentCardNumber

[hirotasoshu]

• Add Discover card brand to PaymentCardNumber #47
• Add Verve card brand to PaymentCardNumber #43
• Add Dankort card brand to PaymentCardNumber #42
• Add Troy card brand to PaymentCardNumber #41
• Add Maestro card brand to PaymentCardNumber #40
• Add UnionPay card brand to PaymentCardNumber #39
• Add JCB card brand to PaymentCardNumber #38
• Add MIR card brand to PaymentCardNumber #37

This list contains several card brands taken from here, feel free to add more)

[yezz123]

Sounds Great 👍🏻

It would be great if you open a PR regarding this

[hirotasoshu]

@yezz123 I would love to work on it! But wouldn't it be better to create a separate issue for each card brand and use this issue as a tracker? This way we will have small, distinct patches and everyone who also want to contribute will be able to participate

[Kludex]

@yezz123 I would love to work on it! But wouldn't it be better to create a separate issue for each card brand and use this issue as a tracker? This way we will have small, distinct patches and everyone who also want to contribute will be able to participate

Let's just track the related PRs here. 👍

[kkirsche]

This may be of use to whoever is implementing this when writing tests:

https://developer.paypal.com/api/rest/sandbox/card-testing/#link-creditcardgenerator