Merge pull request #2 from danirock99/master

Updated in order to be used with NS7

src/paypal-checkout.android.ts

@@ -4,7 +4,9 @@ import * as app from "tns-core-modules/application";
 declare const com: any;
 
 export class PaypalCheckout extends Common {
-
+    constructor(){
+        super();
+    }
     paypalRequest(options: PaypalOptions): Promise<any> {
         return new Promise(function (resolve, reject) {
             let braintree = null;

src/paypal-checkout.common.ts

@@ -1,3 +1,7 @@
 import { Observable } from 'tns-core-modules/data/observable';
 
-export class Common extends Observable { }
+export class Common extends Observable {
+    constructor(){
+        super();
+    }
+ }

src/paypal-checkout.ios.ts

@@ -3,7 +3,9 @@ import { Common } from './paypal-checkout.common';
 declare const BTAPIClient: any, BTPayPalDriver: any, BTPayPalRequest: any;
 
 export class PaypalCheckout extends Common {
-
+    constructor(){
+        super();
+    }
     paypalRequest(options: PaypalOptions): Promise<any> {
         return new Promise(function (resolve, reject) {
             var context = this;

src/tsconfig.json

@@ -1,6 +1,6 @@
 {
     "compilerOptions": {
-        "target": "es5",
+        "target": "es6",
         "module": "commonjs",
         "declaration": true,
         "removeComments": true,