grunt: jquery-migrate via bower
grunt: jquery-migrate via bower

Signed-off-by: Yoan Blanc <7e8c88beed64bd6a341c3085bc82ac100e832f6e@cern.ch>

inveniosoftware/invenio-previewer,inveniosoftware/invenio-previewer,inveniosoftware/invenio-previewer,inveniosoftware/invenio-previewer