chore: add expand parameter to dynamic checkout

Author: jakubjasinsky

package.json

@@ -1,6 +1,6 @@
 {
   "name": "processout.js",
-  "version": "1.2.9",
+  "version": "1.3.0",
   "description": "ProcessOut.js is a JavaScript library for ProcessOut's payment processing API.",
   "scripts": {
     "build:processout": "tsc -p src/processout && uglifyjs --compress --keep-fnames --ie8 dist/processout.js -o dist/processout.js",

src/dynamic-checkout/dynamic-checkout.ts

@@ -58,7 +58,7 @@ module ProcessOut {
 
       this.processOutInstance.apiRequest(
         "GET",
-        `invoices/${this.paymentConfig.invoiceId}?expand=transaction`,
+        `invoices/${this.paymentConfig.invoiceId}?expand=payment_methods&expand=transaction`,
         {},
         onSuccess.bind(this),
         onError.bind(this),