Make the build reproducible

This bumps to pom-fiji 5.0.4, which upgrades the 3D_Viewer
component to 3.0.1, its first non-tainted release.

It eliminates the following error:

    $ mvn org.scijava:scijava-maven-plugin:0.3.0:verify-no-snapshots
    [ERROR] Found SNAPSHOT version:
            sc.fiji:pal-optimization:2.0.0-SNAPSHOT
            sc.fiji:VIB-lib:2.0.0
            sc.fiji:3D_Viewer:3.0.0
            sc.fiji:Fiji_Developer:2.0.2-SNAPSHOT