Update dependencies for version 18.0.0-beta1

package.json

@@ -21,9 +21,10 @@
     "@webcomponents/shadycss": "^1.9.4",
     "@vaadin/vaadin-accordion": "^1.2.0",
     "@vaadin/vaadin-app-layout": "^2.2.0",
+    "@vaadin/vaadin-avatar": "^1.0.1",
     "@vaadin/vaadin-button": "^2.4.0",
     "@vaadin/vaadin-checkbox": "^2.5.0",
-    "@vaadin/vaadin-combo-box": "^5.4.1",
+    "@vaadin/vaadin-combo-box": "^5.4.3",
     "@vaadin/vaadin-context-menu": "^4.5.0",
     "@vaadin/vaadin-control-state-mixin": "^2.2.3",
     "@vaadin/vaadin-custom-field": "^1.3.0",
@@ -34,7 +35,7 @@
     "@vaadin/vaadin-dialog": "^2.5.2",
     "@vaadin/vaadin-element-mixin": "^2.4.1",
     "@vaadin/vaadin-form-layout": "^2.3.0",
-    "@vaadin/vaadin-grid": "^5.7.4",
+    "@vaadin/vaadin-grid": "^5.7.6",
     "@vaadin/vaadin-icons": "^4.3.1",
     "@vaadin/vaadin-item": "^2.3.0",
     "@vaadin/vaadin-list-box": "^1.4.0",