Update version to 2.12-SNAPSHOT

Change-Id: Ibf5ca0f9852f899bb84a4c512aa93054233c5b74

pom.xml

diff --git a/pom.xml b/pom.xml
index a1613ff..f2f2ad0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -21,7 +21,7 @@
 
   <groupId>com.googlesource.gerrit.plugins.bugzilla</groupId>
   <artifactId>its-bugzilla</artifactId>
-  <version>2.11-SNAPSHOT</version>
+  <version>2.12-SNAPSHOT</version>
 
   <name>Gerrit - Bugzilla support</name>