Update version to 2.12-SNAPSHOT

Change-Id: I9210be90136ac7a2a27908cd56042bf075bd0e2f

pom.xml

diff --git a/pom.xml b/pom.xml
index 08dacb8..46ee875 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
   <groupId>com.googlesource.gerrit.plugins.its</groupId>
   <artifactId>its-base</artifactId>
   <packaging>jar</packaging>
-  <version>2.11-SNAPSHOT</version>
+  <version>2.12-SNAPSHOT</version>
   <name>Gerrit Code Review - Issue tracker support</name>
 
   <properties>