Merge branch 'master' of github.com:nativescript-community/nativescript-collectionview

# Conflicts:
#	yarn.lock

Author: farfromrefug

demo-snippets/package.json

@@ -6,6 +6,7 @@
         "@nativescript-community/ui-collectionview": "*",
         "@nativescript-community/ui-collectionview-alignedflowlayout": "*",
         "@nativescript-community/ui-collectionview-swipemenu": "*",
-        "@nativescript-community/ui-collectionview-waterfall": "*"
+        "@nativescript-community/ui-collectionview-waterfall": "*",
+        "@nativescript-community/ui-pulltorefresh": "*"
     }
 }

src/collectionview/index.ios.ts

@@ -679,7 +679,10 @@ export class CollectionView extends CollectionViewBase {
         if (!view) {
             return -1;
         }
-        return view.indexPathsForVisibleItems?.objectAtIndex(0)?.row ?? -1;
+        const indexes = Array.from<NSIndexPath>(view.indexPathsForVisibleItems)
+            .map((e) => e.row)
+            .sort();
+        return indexes[0] ?? -1;
     }
     @profile
     public refresh() {