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

Author: headius

pom.xml

@@ -9,7 +9,7 @@
   <groupId>com.github.jnr</groupId>
   <artifactId>jnr-ffi</artifactId>
   <packaging>jar</packaging>
-  <version>2.2.12</version>
+  <version>2.2.13-SNAPSHOT</version>
   <name>jnr-ffi</name>
   <description>A library for invoking native functions from java</description>
   <url>http://github.com/jnr/jnr-ffi</url>