Merge pull request #553 from HumanBrainProject/chore_bumpVersion

bump version

package.json

 {
   "name": "interactive-viewer",
-  "version": "2.2.2",
+  "version": "2.3.0",
   "description": "HBP interactive atlas viewer. Integrating KG query, dataset previews & more. Based on humanbrainproject/nehuba & google/neuroglancer. Built with angular.io",
   "scripts": {
     "dev-server-export": "webpack-dev-server --config webpack.export.js",