build: add vaadin-dev dependency in v25 profile

Author: paodb

pom.xml

@@ -409,7 +409,12 @@
 				<jetty.version>11.0.26</jetty.version>
 			</properties>            
 			<dependencies>
-                <dependency>
+                 <dependency>
+                    <groupId>com.vaadin</groupId>
+                    <artifactId>vaadin-dev</artifactId>
+                    <optional>true</optional>
+                </dependency>
+				<dependency>
 					<groupId>com.flowingcode.vaadin.addons.demo</groupId>
 					<artifactId>commons-demo</artifactId>
 					<version>5.0.0</version>