cmst: 2017.09.19 -> 2018.01.06

Semi-automatic update. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 2018.01.06 with grep in /nix/store/va2g67lavq3xhp2154dlgz95p4438ccx-cmst-2018.01.06
- found 2018.01.06 in filename of file in /nix/store/va2g67lavq3xhp2154dlgz95p4438ccx-cmst-2018.01.06