Minor changes

Author: guygriffiths

docs/images/palettes.png

@@ -151,7 +151,7 @@
         <plugins>
             <plugin>
                 <artifactId>maven-war-plugin</artifactId>
-                <version>2.2</version>
+                <version>3.3.1</version>
                 <configuration>
                     <primaryArtifact>false</primaryArtifact>
                     <attachClasses>true</attachClasses>