Release of 6.0.2

* Thu Sep 10 2020 Liz Nemsick <lnemsick.simp@gmail.com> - 6.0.2
  - Fixed a typo in an error message emitted when `simp config` cannot
    proceed because the environment to configure already exists.
  - Fixed a bug in `simp environment new` in which the actual failure
    messages from a failed `setfacl --restore` execution are not logged.
  - Updated HighLine from version 1.7.8 to 2.0.3.