build: update commons-demo dependency to 3.0.0

Author: javier-godoy

pom.xml

@@ -115,7 +115,7 @@
         <dependency>
 			<groupId>com.flowingcode.vaadin.addons.demo</groupId>
 			<artifactId>commons-demo</artifactId>
-			<version>2.1.0-SNAPSHOT</version>
+			<version>3.0.0</version>
 			<scope>test</scope>
 		</dependency>
     </dependencies>