Here's a `table` method

[LTLA]

plz add

# TODO: move to biocutils.
@singledispatch
def table(x: Sequence, sort: bool = True) -> biocutils.IntegerList:
    output = {}
    for v in x:
        if v in output:
            output[v] += 1
        else:
            output[v] = 1

    if sort:
        collected = sorted(output.keys())
        tmp = {}
        for y in collected:
            tmp[y] = output[y]
        output = tmp

    return biocutils.IntegerList.from_dict(output)

see also #31 to make sure the output is actually an IntegerList.