Update version to 2.0.2

Author: grapoza

package.json

@@ -3,7 +3,7 @@
   "description": "Yet another Vue treeview component.",
   "author": "Gregg Rapoza <grapoza@gmail.com>",
   "license": "MIT",
-  "version": "2.0.1",
+  "version": "2.0.2",
   "main": "dist/vue-tree.umd.min.js",
   "browser": "index.js",
   "repository": {