feat: allow src to be a promise

Author: farfromrefug

src/image.android.ts

@@ -487,10 +487,13 @@ export class Img extends ImageBase {
     //     this.initImage();
     // }
 
-    private initImage() {
+    private async initImage() {
         if (this.nativeViewProtected) {
             // this.nativeViewProtected.setImageURI(null);
-            const src = this.src;
+            let src = this.src;
+            if (src instanceof Promise) {
+                src = await src;
+            }
             if (src) {
                 let drawable: android.graphics.drawable.BitmapDrawable;
                 if (src instanceof ImageSource) {

src/image.d.ts

@@ -1,4 +1,4 @@
-import { ImageSource, View } from '@nativescript/core';
+import { ImageAsset, ImageSource, View } from '@nativescript/core';
 
 
 /**
@@ -75,7 +75,7 @@ export class Img extends View {
     /**
      * String value used for the image URI.
      */
-    src: string | ImageSource;
+    src: string | ImageSource | ImageAsset | Promise<string | ImageSource | ImageAsset> ;
 
     /**
      * String value used for the lower res image URI.

src/image.ios.ts

@@ -357,9 +357,12 @@ export class Img extends ImageBase {
         return image;
     }
 
-    private initImage() {
+    private async initImage() {
         if (this.nativeViewProtected) {
-            const src = this.src;
+            let src = this.src;
+            if (src instanceof Promise) {
+                src = await src;
+            }
             if (src) {
                 const animate = this.fadeDuration > 0;
                 if (src instanceof ImageSource) {