fix(plugins): fix rxjs 6 build errors

#2439

src/@ionic-native/plugins/apple-pay/index.ts

@@ -1,15 +1,21 @@
 import { Injectable } from '@angular/core';
-import { Observable } from 'rxjs/Observable';
+import { Observable } from 'rxjs';
 import { Cordova, IonicNativePlugin, Plugin } from '@ionic-native/core';
 
 export type IMakePayments =
-  'This device can make payments and has a supported card'
+  | 'This device can make payments and has a supported card'
   | 'This device cannot make payments.'
   | 'This device can make payments but has no supported cards';
 export type IShippingType = 'shipping' | 'delivery' | 'store' | 'service';
-export type IBillingRequirement = 'none' | 'all' | 'postcode' | 'name' | 'email' | 'phone';
+export type IBillingRequirement =
+  | 'none'
+  | 'all'
+  | 'postcode'
+  | 'name'
+  | 'email'
+  | 'phone';
 export type ITransactionStatus =
-  'success'
+  | 'success'
   | 'failure'
   | 'invalid-billing-address'
   | 'invalid-shipping-address'
@@ -18,7 +24,9 @@ export type ITransactionStatus =
   | 'incorrect-pin'
   | 'locked-pin';
 export type ICompleteTransaction = 'Payment status applied.';
-export type IUpdateItemsAndShippingStatus = 'Updated List Info' | 'Did you make a payment request?';
+export type IUpdateItemsAndShippingStatus =
+  | 'Updated List Info'
+  | 'Did you make a payment request?';
 
 export interface IPaymentResponse {
   billingNameFirst?: string;
@@ -144,11 +152,10 @@ export interface ISelectedShippingContact {
   plugin: 'cordova-plugin-applepay',
   pluginRef: 'ApplePay',
   repo: 'https://github.com/samkelleher/cordova-plugin-applepay',
-  platforms: ['iOS'],
+  platforms: ['iOS']
 })
 @Injectable()
 export class ApplePay extends IonicNativePlugin {
-
   /**
    * Detects if the current device supports Apple Pay and has any capable cards registered.
    * @return {Promise<IMakePayments>} Returns a promise
@@ -183,7 +190,9 @@ export class ApplePay extends IonicNativePlugin {
     observable: true,
     clearFunction: 'stopListeningForShippingContactSelection'
   })
-  startListeningForShippingContactSelection(): Observable<ISelectedShippingContact> {
+  startListeningForShippingContactSelection(): Observable<
+    ISelectedShippingContact
+  > {
     return;
   }
 
@@ -237,7 +246,9 @@ export class ApplePay extends IonicNativePlugin {
   @Cordova({
     otherPromise: true
   })
-  updateItemsAndShippingMethods(list: IOrderItemsAndShippingMethods): Promise<IUpdateItemsAndShippingStatus> {
+  updateItemsAndShippingMethods(
+    list: IOrderItemsAndShippingMethods
+  ): Promise<IUpdateItemsAndShippingStatus> {
     return;
   }
 
@@ -330,7 +341,9 @@ export class ApplePay extends IonicNativePlugin {
   @Cordova({
     otherPromise: true
   })
-  completeLastTransaction(complete: ITransactionStatus): Promise<ICompleteTransaction> {
+  completeLastTransaction(
+    complete: ITransactionStatus
+  ): Promise<ICompleteTransaction> {
     return;
   }
 }