Log Message:
Update to 3.52. From the changelog:

- added negation `~` to test state indicators
  (https://gitlab.com/saalen/highlight/issues/122)
- added support for Hugo
  (https://gitlab.com/saalen/highlight/merge_requests/113)
- added 5 duotone themes
  (https://gitlab.com/saalen/highlight/merge_requests/115)
- CLI: fixed segfault with `--force`
  (https://gitlab.com/saalen/highlight/issues/125)
- GUI: limited font selection to monospace fonts
  (https://gitlab.com/saalen/highlight/issues/124)