Update version to 2.12-SNAPSHOT

Change-Id: I29f336e1405a6d09fc737beed8eb18a685bab84a

pom.xml

diff --git a/pom.xml b/pom.xml
index 641a6c0..0fe92c2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -20,7 +20,7 @@
   <groupId>com.googlesource.gerrit.plugins.its</groupId>
   <artifactId>its-jira</artifactId>
   <packaging>jar</packaging>
-  <version>2.11-SNAPSHOT</version>
+  <version>2.12-SNAPSHOT</version>
   <name>Gerrit Code Review - Atlassian Jira support</name>
   <properties>
     <Gerrit-ApiType>plugin</Gerrit-ApiType>