installation: requirements update

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: datacite xsl references fix

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
base: initial json-ld output format

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
deposit: workflow objects upgrade fix

* Fixes issue in task counter introduced from pu.

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
installation: dependency change

Signed-off-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>