test: upgrade testbench-rpc to 1.4.0-SNAPSHOT

Author: javier-godoy

pom.xml

@@ -174,7 +174,7 @@
 		<dependency>
 			<groupId>com.flowingcode.vaadin.test</groupId>
 			<artifactId>testbench-rpc</artifactId>
-			<version>1.0.0</version>
+			<version>1.4.0-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>