Update dependency software.xdev:chartjs-java-model to v2.9.0

Author: xdev-renovate

vaadin-chartjs-wrapper-demo/pom.xml

@@ -102,7 +102,7 @@
 		<dependency>
 			<groupId>software.xdev</groupId>
 			<artifactId>chartjs-java-model</artifactId>
-			<version>2.8.1</version>
+			<version>2.9.0</version>
 		</dependency>
 
 		<!-- Spring -->