Update backend-api to 4.0.0

This change is associated with who-icatx/icatx-project#300

Author: matthewhorridge

pom.xml

@@ -10,7 +10,7 @@
     </parent>
     <groupId>edu.stanford.protege</groupId>
     <artifactId>webprotege-gwt-api-gateway</artifactId>
-    <version>2.0.9</version>
+    <version>3.0.0-SNAPSHOT</version>
     <name>webprotege-gwt-api-gateway</name>
     <description>The API Gateway for the WebProtégé GWT User Interface</description>
     <properties>
@@ -153,7 +153,7 @@
         <dependency>
             <groupId>edu.stanford.protege</groupId>
             <artifactId>webprotege-backend-api</artifactId>
-            <version>3.0.0</version>
+            <version>4.0.0</version>
         </dependency>
 
         <dependency>