deposit: Flask-RESTful update
deposit: Flask-RESTful update

* Updates Flask-RESTful to version 0.2.12 which fixes a regression
  introduced in 0.2.11.

Signed-off-by: Lars Holm Nielsen <7eaffca9f7cd98839b5821d0d23e09ff764b82cd@cern.ch>

inveniosoftware/invenio,inveniosoftware/invenio,tiborsimko/invenio,tiborsimko/invenio