feat(GoogleMaps): Allow specify enableHighAccuracy option that attempt to get your location with highest accuracy (#410)

src/plugins/googlemaps.ts

@@ -129,7 +129,7 @@ export class GoogleMap {
    * @return {Promise<MyLocation>}
    */
   @CordovaInstance()
-  getMyLocation(): Promise<MyLocation> {
+  getMyLocation(options?:MyLocationOptions): Promise<MyLocation> {
     return;
   }
 
@@ -361,6 +361,13 @@ export interface MyLocation {
   bearing?: number;
 }
 
+/**
+ * @private
+ */
+export interface MyLocationOptions {
+  enableHighAccuracy?: boolean;
+}
+
 /**
  * @private
  */