Update wtforms-json from 0.2.10 to 0.3.0
Update wtforms-json from 0.2.10 to 0.3.0

opendatateam/udata,opendatateam/udata,etalab/udata,davidbgk/udata,davidbgk/udata,etalab/udata,davidbgk/udata,etalab/udata,opendatateam/udata