read infos from package.json

Summary:
Adding the properties from a plugin's `package.json` as static properties to the class.
The name from `package.json` is used as it's `id`.

This allows us in the future to add meta information about a plugin to it's package.json and still use the data inside the app.

Reviewed By: priteshrnandgaonkar

Differential Revision: D13417288

fbshipit-source-id: 3d0a62d4cb0115153cce1aaee677b9680fefebf4

src/NotificationsHub.js

@@ -472,7 +472,7 @@ class NotificationItem extends Component<ItemProps, ItemState> {
     const items = [];
     if (props.onHidePlugin && props.plugin) {
       items.push({
-        label: `Hide ${props.plugin.title} plugin`,
+        label: `Hide ${props.plugin.title || props.plugin.id} plugin`,
         click: this.props.onHidePlugin,
       });
     }