Updated version to next development iteration.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/trunk@1598390 13f79535-47bb-0310-9956-ffa450edef68
Set release date for 1.9.2.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/trunk@1598392 13f79535-47bb-0310-9956-ffa450edef68