Update dependencies for version 15.0.0-alpha2

bower.json

     "update-core-version.js"
   ],
   "dependencies": {
-    "vaadin-core": "15.0.0-alpha1",
+    "vaadin-core": "vaadin-core#15.0.0-alpha2",
     "vaadin-board": "vaadin-board#2.1.0",
     "vaadin-charts": "vaadin-charts#6.2.3",
     "vaadin-confirm-dialog": "vaadin-confirm-dialog#1.1.4",
     "vaadin-cookie-consent": "vaadin-cookie-consent#1.1.1",
     "vaadin-crud": "vaadin-crud#1.0.5",
-    "vaadin-grid-pro": "vaadin-grid-pro#2.0.3",
-    "vaadin-rich-text-editor": "vaadin-rich-text-editor#1.0.4",
+    "vaadin-grid-pro": "vaadin-grid-pro#2.0.4",
+    "vaadin-rich-text-editor": "vaadin-rich-text-editor#1.1.0",
     "vaadin-license-checker": "vaadin-license-checker#2.1.1"
   }
 }

package.json

 {
   "name": "@vaadin/vaadin",
   "version": "15.0.0-alpha1",
-  "description": "Vaadin Elements is an evolving set of open source custom HTML elements for building mobile and desktop web applications in modern browsers.",
+  "description": "Vaadin components is an evolving set of open sourced custom HTML elements for building mobile and desktop web applications in modern browsers.",
   "author": "Vaadin Ltd",
   "license": "(Apache-2.0 OR SEE LICENSE IN https://vaadin.com/license/cval-3.0)",
+  "main": "vaadin.js",
   "dependencies": {
-    "@vaadin/vaadin-core": "^15.0.0-alpha1",
+    "@vaadin/vaadin-core": "^15.0.0-alpha2",
     "@vaadin/vaadin-board": "^2.1.0",
     "@vaadin/vaadin-charts": "^6.2.3",
     "@vaadin/vaadin-confirm-dialog": "^1.1.4",
     "@vaadin/vaadin-cookie-consent": "^1.1.1",
     "@vaadin/vaadin-crud": "^1.0.5",
-    "@vaadin/vaadin-grid-pro": "^2.0.3",
-    "@vaadin/vaadin-rich-text-editor": "^1.0.4"
+    "@vaadin/vaadin-grid-pro": "^2.0.4",
+    "@vaadin/vaadin-rich-text-editor": "^1.1.0"
   },
   "files": [
     "vaadin.js"