Fixes issue where source array is corrupted with duplicates when destroyed items exist before sorting.

[chadedrupt]

Steps to reproduce issue:

• Configure the sortable to use strategyMove
• Start with 3 items in array.
• Destroy the middle item.
• Switch the order of the remaining two items.
• Observe a duplicate item has been inserted and the destroyed item has been removed.

This is happens because currently updateIndexFromDestroyedItems is passed in an index of 1 and it only searches the source array for destroyed items up to i < 1 however in the source array our destroyed item is at index 1, therefore the destroyed item's influence on the required indexes is ignored.

[rniemeyer]

Thanks @chadedrupt! - merged and published as 1.1.1.