Preemptively bump to the new parent POM version

Unfortunately, we have to configure the enforcer plugin differently
because of the many conflicts the fat Batik artifact has with Java6' and
other dependencies' XML classes.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump to next development cycle

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>