Stripe: IBalanceTransaction.exchange_rate and ICharge.dispute (#38110)

* Added missing params to Charge, Customer and related create and update options.  Adding Customer Tax Id.

* Fix build errors that aren't caught by `npm run lint stripe`.

* Add IBalanceTransaction.exchange_rate.  ICharge.dispute may be a string.

* PR feedback.

types/stripe/index.d.ts

@@ -1091,6 +1091,8 @@ declare namespace Stripe {
 
             description?: string;
 
+            exchange_rate?: number | null;
+
             /**
              * Fee (in cents/pence) paid for this transaction
              */
@@ -1258,9 +1260,9 @@ declare namespace Stripe {
             destination?: string | accounts.IAccount | null;
 
             /**
-             * Details about the dispute if the charge has been disputed.
+             * Details about the dispute if the charge has been disputed. [Expandable]
              */
-            dispute?: disputes.IDispute | null;
+            dispute?: string | disputes.IDispute | null;
 
             /**
              * Error code explaining reason for charge failure if available (see the errors section for a list of