Remove deprecated version field
Remove deprecated version field

As indicated here: https://github.com/bower/spec/blob/master/json.md#version
longbill/jquery-date-range-picker,fede91it/jquery-date-range-picker,darkdiesel/jquery-date-range-picker,longbill/jquery-date-range-picker,dsgraham/jquery-date-range-picker,fede91it/jquery-date-range-picker,dsgraham/jquery-date-range-picker,darkdiesel/jquery-date-range-picker