Feature Request: sort!(::UnfrozenLittleDict{K,V})

[iamed2]

sort!(::UnfrozenLittleDict{K,V}) would be nice to have.

Are there any problems with:

function sort!(d::UnfrozenLittleDict; byvalue::Bool=false, args...)
    if byvalue
        p = sortperm(d.vals; args...)
    else
        p = sortperm(d.keys; args...)
    end
    permute!(d.keys, p)
    permute!(d.vals, p)
    return d
end

?

[oxinabox]

Looks reasonable to me.
I think I just forgot to implement it.