Do not hard-code the scijava-common version in Build.sh

That value was not used, anyway.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Bump ImageJ2 yet again

There were a couple of API-breaking changes in scijava-common
recently. Ideally, we would not break the API, ever, but to expect
that would not be realistic. Therefore, Curtis Rueden finalized the
1.0.0 version of scijava-common and subsequent changes will have to
increase at least the minor version number.

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