feat(bundle): Rename UMD name from ui-router-visualizer to `@uirout…

…er/visualizer` for consistency

BREAKING CHANGE: UMD name renamed from `ui-router-visualizer` to `@uirouter/visualizer`.
This will affect people who add the visualizer using script tags, instead of a bundler.

```
var Visualizer = window['@uirouter/visualizer'];
router.plugin(Visualizer);
```

webpack.config.js

@@ -16,7 +16,7 @@ module.exports = {
     publicPath: "/_bundles/",
     filename: "[name].js",
     libraryTarget: "umd",
-    library: "ui-router-visualizer",
+    library: "@uirouter/visualizer",
     umdNamedDefine: true
   },