Log Message:
sayaka: update to 3.4.2.

pkgsrc changes:
- remove a patch applied to upstream
- pull a post 3.4.2 fix for detection of sixel support

Upstream changes:

* 3.4.2 (2020/02/01)
  Support monochrome terminal.
  Implement --no-color option.
  Add --no-image option (past --noimg is still valid)
  Show an icon mark on non-sixel-capable terminal.
  Autodetect if terminal supports sixel or not.