feat(ble): add startScanWithOptions

closes #539

src/plugins/ble.ts

@@ -207,6 +207,18 @@ export class BLE {
   })
   static startScan(services: string[]): Observable<any> { return; }
 
+  /**
+   * Scans for BLE devices. This function operates similarly to the `startScan` function, but allows you to specify extra options (like allowing duplicate device reports).
+   * @param {string[]} services  List of service UUIDs to discover, or `[]` to find all devices
+   * @param options {any}
+   */
+  @Cordova({
+    observable: true,
+    clearFunction: 'stopScan',
+    clearWithArgs: true
+  })
+  static startScanWithOptions(services: string[], options: {reportDuplicates?: boolean} | any): Observable<any> { return; }
+
   /**
    * Stop a scan started by `startScan`.
    *