[fix] Add event parameter to Image onLoad callback

Close #1723

packages/react-native-web/src/exports/Image/index.js

@@ -236,7 +236,7 @@ const Image = forwardRef<ImageProps, *>((props, ref) => {
         function load(e) {
           updateState(LOADED);
           if (onLoad) {
-            onLoad();
+            onLoad(e);
           }
           if (onLoadEnd) {
             onLoadEnd();

packages/react-native-web/src/modules/ImageLoader/index.js

@@ -119,7 +119,7 @@ const ImageLoader = {
     image.onerror = onError;
     image.onload = e => {
       // avoid blocking the main thread
-      const onDecode = () => onLoad();
+      const onDecode = () => onLoad({ nativeEvent: e });
       if (typeof image.decode === 'function') {
         // Safari currently throws exceptions when decoding svgs.
         // We want to catch that error and allow the load handler