Migrates jquery-ui to npm package

jquery-ui has been updated in the regristry to point to npm:jquery-ui
instead of github:components/jqueryui.

Further, package-overrides that pointed at the github:components version
of both jquery-ui and jquery have been updated to rely on the npm version
of the package.

Fixes #1008

package-overrides/github/gvas/knockout-jqueryui@2.2.2.json

@@ -2,7 +2,7 @@
     "main": false,
     "dependencies": {
         "jquery": "npm:jquery",
-        "jqueryui": "github:components/jqueryui",
+        "jqueryui": "npm:jquery-ui",
         "knockout": "github:knockout/knockout"
     },
     "map": {