Concatenate footnotes like [4-7] instead of [4][5][6][7]

[huachuman]

This plugin is perfect and works way better than any other I've tested. But I do have one issue: note numbers are not concatenated. So when I cite a number of sources, they show up as long trailing tails of numbers. I cannot currently use the plugin as intended because it ends up looking unprofessional in a way.

It would be great to be able to concatenate ranges of numbers, for example if all the citations between 4 and 7 are used, then instead of displaying [4][5][6][7], it would just show [4-7].