[slider unit tests] Use new versionTest() function to correctly ident…

…ify jQuery versions less than 1.8

tests/unit/slider/slider_events.js

@@ -401,7 +401,7 @@
 	// and with the advent of the widget _on method we are actually testing the
 	// widget from UI which has it's own test suite for these sorts of things
 	// ie, don't test your dependencies / framework
-	if( !( $.fn.jquery.match(/^1.8/) )){
+	if( $.testHelper.versionTest( $.fn.jquery, function( l, r ) { return ( l < r ); }, "1.8" ) ){
 		test( "slider should detach event", function() {
 			var slider = $( "#remove-events-slider" ),
 			doc = $( document ),