test: update testbench-rpc to 1.5.0

Author: javier-godoy

pom.xml

@@ -98,7 +98,7 @@
         <dependency>
             <groupId>com.flowingcode.vaadin.test</groupId>
             <artifactId>testbench-rpc</artifactId>
-            <version>1.4.0</version>
+            <version>1.5.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>