Build: Set version to 1.10.0pre.

Author: scottgonzalez

package.json

@@ -2,7 +2,7 @@
 	"name": "jquery-ui",
 	"title": "jQuery UI",
 	"description": "A curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library.",
-	"version": "1.9.1pre",
+	"version": "1.10.0pre",
 	"homepage": "http://jqueryui.com",
 	"author": {
 		"name": "jQuery Foundation and other contributors",