Update dependencies for version 21.0.0-alpha1

package.json

@@ -6,14 +6,14 @@
   "license": "(Apache-2.0 OR SEE LICENSE IN https://vaadin.com/license/cvdl-4.0)",
   "main": "vaadin.js",
   "dependencies": {
-    "@vaadin/vaadin-board": "^20.0.0-alpha5",
-    "@vaadin/vaadin-charts": "^20.0.0-alpha5",
-    "@vaadin/vaadin-confirm-dialog": "^20.0.0-alpha5",
-    "@vaadin/vaadin-cookie-consent": "^20.0.0-alpha5",
-    "@vaadin/vaadin-core": "^20.0.0-alpha8",
-    "@vaadin/vaadin-crud": "^20.0.0-alpha5",
-    "@vaadin/vaadin-grid-pro": "^20.0.0-alpha5",
-    "@vaadin/vaadin-rich-text-editor": "^20.0.0-alpha5"
+    "@vaadin/vaadin-board": "^21.0.0-alpha2",
+    "@vaadin/vaadin-charts": "^21.0.0-alpha2",
+    "@vaadin/vaadin-confirm-dialog": "^21.0.0-alpha2",
+    "@vaadin/vaadin-cookie-consent": "^21.0.0-alpha2",
+    "@vaadin/vaadin-core": "^21.0.0-alpha1",
+    "@vaadin/vaadin-crud": "^21.0.0-alpha2",
+    "@vaadin/vaadin-grid-pro": "^21.0.0-alpha2",
+    "@vaadin/vaadin-rich-text-editor": "^21.0.0-alpha2"
   },
   "files": [
     "vaadin.js"