[maven-release-plugin] prepare release exec-maven-plugin-1.3

git-svn-id: https://svn.codehaus.org/mojo/trunk/mojo/exec-maven-plugin@19662 52ab4f32-60fc-0310-b215-8acea882cd1b
[maven-release-plugin] prepare for next development iteration

git-svn-id: https://svn.codehaus.org/mojo/trunk/mojo/exec-maven-plugin@19664 52ab4f32-60fc-0310-b215-8acea882cd1b