Re-add scijava-common:test dependency to the uploaders

For the integration tests, we depend on the updater-core-tests artifact.
Unfortunately, test-scoped dependencies do not drag in transitive
test-scope dependencies. Therefore, we need to make sure that
scijava-common-tests is also listed explicitly.

Thanks, Jemal Jenkins.

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