[maven-release-plugin] prepare release msgpack-0.6.3

Author: frsyuki

pom.xml

@@ -6,7 +6,7 @@
  <name>MessagePack for Java</name>
  <description>MessagePack for Java is a binary-based efficient object
  serialization library in Java.</description>
- <version>0.6.3-SNAPSHOT</version>
+ <version>0.6.3</version>
  <packaging>jar</packaging>
  <url>http://msgpack.org/</url>