[maven-release-plugin] prepare for next development iteration

Change-Id: I402d857eef9f3e5f3765427c5d3b868ed5a3a22e

pom.xml

@@ -3,7 +3,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.flatbuffers</groupId>
   <artifactId>flatbuffers-java</artifactId>
-  <version>1.11.0</version>
+  <version>1.11.1-SNAPSHOT</version>
   <packaging>bundle</packaging>
   <name>FlatBuffers Java API</name>
   <description>
@@ -30,7 +30,7 @@
     <connection>
       scm:git:https://github.com/google/flatbuffers.git
     </connection>
-    <tag>1.11.0</tag>
+    <tag>HEAD</tag>
   </scm>
   <dependencies>
   </dependencies>