Add onwheel

Author: vhiairrassary

src/main/scala/org/scalajs/dom/raw/Html.scala

@@ -398,6 +398,8 @@ abstract class HTMLDocument extends Document {
 
   var onmousewheel: js.Function1[WheelEvent, _] = js.native
 
+  var onwheel: js.Function1[WheelEvent, _] = js.native
+
   var onscroll: js.Function1[UIEvent, _] = js.native
 
   /**
@@ -3396,6 +3398,7 @@ abstract class HTMLElement extends Element {
   var onmouseout: js.Function1[MouseEvent, _] = js.native
   var parentElement: HTMLElement = js.native
   var onmousewheel: js.Function1[WheelEvent, _] = js.native
+  var onwheel: js.Function1[WheelEvent, _] = js.native
   var onvolumechange: js.Function1[Event, _] = js.native
   var filters: Object = js.native
 

src/main/scala/org/scalajs/dom/raw/lib.scala

@@ -2468,6 +2468,8 @@ class Window
 
   var onmousewheel: js.Function1[WheelEvent, _] = js.native
 
+  var onwheel: js.Function1[WheelEvent, _] = js.native
+
   /**
    * An event handler property for window loading.
    *