[Cards] Bug: iOS SDK card expiry validation is hardcoded

[zakiarsyad]

context:

• https://xendit.slack.com/archives/C06L0DLT48Z/p1716458994957289?thread_ts=1716431731.182719&cid=C06L0DLT48Z
• The iOS SDK card expiry validation is hard coded to 2017 -->

  xendit-sdk-ios-src/Sources/Xendit/Utils/CreditCard.swift

  Line 47 in a23b39f

  public static func isExpiryValid(cardExpirationMonth: String, cardExpirationYear: String) -> Bool {

• It is not reflected in the current year

task:

• Update the validation to be relevant with current year and the future

[zakiarsyad]

It also happens to Android

• https://github.com/xendit/xendit-sdk-android/blob/11cb3a5f9f8a6eee848377795e144538d404c8d8/xendit-android/src/main/java/com/xendit/utils/CardValidator.java#L75

[lordrio]

this bug does not happen on Android to an extra function of
isNotInThePast(cleanMonth, cleanYear);
But still a good practice to remove any hardcoded text.