updated SDK to 2.4.0

Author: travisspencer

pom.xml

@@ -32,7 +32,7 @@
         <dependency>
             <groupId>se.curity.identityserver</groupId>
             <artifactId>identityserver.sdk</artifactId>
-            <version>3.0.0-SNAPSHOT</version>
+            <version>2.4.0</version>
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>