Added RuPay as CardType

[pranjal-barnwal]

Added RuPay as CardType

• added compressed icon of rupay in icons folder
• updated enums, functions and filters inside credit_card_widget.dart to adapt to rupay card

Pattern recognition for RuPay Cards

    CardType.rupay: <List<String>>{
      <String>['60'],
      <String>['6521'],
      <String>['6522'],
    },

About RuPay

Like Visa & MasterCard in US, there's even more prominent type in India called RuPay

RuPay covers more than half of the transactions undergoing in India.

Package Validated

I would also love to collaborate on any future projects. Pranjal 🦚

[vatsaltanna]

@pranjal-barnwal Thank you for your valuable contribution! Your work is greatly appreciated.