#1458: Fixed autoscroll on MacOS Safari

Sortable.js

@@ -95,6 +95,7 @@
 		IE11OrLess = !!navigator.userAgent.match(/(?:Trident.*rv[ :]?11\.|msie|iemobile)/i),
 		Edge = !!navigator.userAgent.match(/Edge/i),
 		// FireFox = !!navigator.userAgent.match(/firefox/i),
+		Safari = !!(navigator.userAgent.match(/safari/i) && !navigator.userAgent.match(/chrome/i) && !navigator.userAgent.match(/android/i)),
 
 		CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
 
@@ -730,8 +731,9 @@
 
 			// IE does not seem to have native autoscroll,
 			// Edge's autoscroll seems too conditional,
+			// MACOS Safari does not have autoscroll,
 			// Firefox and Chrome are good
-			if (fallback || Edge || IE11OrLess) {
+			if (fallback || Edge || IE11OrLess || Safari) {
 				_autoScroll(evt, _this.options, elem, fallback);
 
 				// Listener for pointer element change