version 2.2.xx (last update 2023-09-18)
        + Modify ancombc2 variance formula and the sensitivity analysis

version 2.0.xx (last update 2022-12-17)
        + Add ancombc2 function

version 1.6.xx (last update 2021-08-13)
        + Fixed bugs
        + Updated warning messages
        + Add secom functions

version 1.0.0: (2020-10-31)
        + Release!
