update japicmp to 0.15.7
diff --git a/pom.xml b/pom.xml
index 9d9f78e..54ad1c2 100755
--- a/pom.xml
+++ b/pom.xml
@@ -39,7 +39,7 @@
     <jbake.dest>${project.build.directory}/content</jbake.dest>

     <plugin.enforcer>3.0.0</plugin.enforcer>

     <plugin.resources>3.2.0</plugin.resources>

-    <plugin.japicmp.version>0.15.4</plugin.japicmp.version>

+    <plugin.japicmp.version>0.15.7</plugin.japicmp.version>

     <plugin.japicmp.jspwiki-new>2.11.3-SNAPSHOT</plugin.japicmp.jspwiki-new>

     <plugin.japicmp.jspwiki-old>2.11.0</plugin.japicmp.jspwiki-old>

     <plugin.jbake>0.3.4</plugin.jbake>