Doesn't copy event properties when used with jQuery 3.0

[dmethvin]

The plugin uses fixHooks which are deprecated. Copying the properties in the special event handler will work across all versions.

jquery-mousewheel/jquery.mousewheel.js

Line 28 in 18e3cc1

if ( $.event.fixHooks ) {

[dmethvin]

I've added some tests to make sure properties are copied. In older versions of jQuery we do want fixHooks to remain so that it will copy properties, but for newer 3.0+ jQuery we can just use the property getters.