build: update to vaadin 23.2.6

Update to Vaadin 23.2.6 in npm mode

Fixes #92

Author: mlopezFC

pom.xml

@@ -4,13 +4,13 @@
 
     <groupId>com.flowingcode.addons.applayout</groupId>
     <artifactId>app-layout-addon</artifactId>
-    <version>5.2.1-SNAPSHOT</version>
+    <version>5.3.0-SNAPSHOT</version>
     <name>App Layout Addon</name>
     <description>Integration of app-layout for Vaadin Flow</description>
 
     <properties>
-        <vaadin.version>23.0.9</vaadin.version>
-        <hilla.version>1.0.9</hilla.version>
+        <vaadin.version>23.2.6</vaadin.version>
+        <hilla.version>1.2.6</hilla.version>
 
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>

src/test/resources/vaadin-featureflags.properties

@@ -0,0 +1,2 @@
+# Use Webpack for front-end builds (Deprecated)
+com.vaadin.experimental.webpackForFrontendBuild=true