Bump plugin API to 2.11.6

Change-Id: I53e0b17d755ba7729722fe1900db6efee62b628b
Signed-off-by: Edwin Kempin <ekempin@google.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index 0289c9a..9978bcd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
 
   <properties>
     <Gerrit-ApiType>plugin</Gerrit-ApiType>
-    <Gerrit-ApiVersion>2.10.7</Gerrit-ApiVersion>
+    <Gerrit-ApiVersion>2.11.6</Gerrit-ApiVersion>
   </properties>
 
   <build>