Merge branch 'master' into v5

src/@ionic-native/plugins/qr-scanner/index.ts

@@ -1,5 +1,6 @@
 import { Cordova, IonicNativePlugin, Plugin } from '@ionic-native/core';
 import { Injectable } from '@angular/core';
+import { Cordova, IonicNativePlugin, Plugin } from '@ionic-native/core';
 import { Observable } from 'rxjs';
 
 export interface QRScannerStatus {
@@ -86,11 +87,6 @@ export interface QRScannerStatus {
  *          scanSub.unsubscribe(); // stop scanning
  *        });
  *
- *        // show camera preview
- *        this.qrScanner.show();
- *
- *        // wait for user to scan something, then the observable callback will be called
- *
  *      } else if (status.denied) {
  *        // camera permission was permanently denied
  *        // you must use QRScanner.openSettings() method to guide the user to the settings page