Make the build reproducible

This bumps to pom-fiji 5.0.3, which upgrades components:

* VIB-lib -> 2.0.1

The above aforementioned component was previously a tainted release,
relying on SNAPSHOTs in its dependency and/or inheritance hierarchy.

Specifically, VIB-lib 2.0.0:

* Depends on pal-optimization 2.0.0-SNAPSHOT
* Depends on the tainted fiji-lib 2.0.0
Bump to next development cycle

Signed-off-by: Curtis Rueden <ctrueden@wisc.edu>