v0.8.7.0

- 0.8.7.0 (2021-03-12)
    * Fix alignment and display of CJK characters in presentation title, author
      and tables
    * Add support for showing images in Kitty terminal
    * Search in `$PATH` for `w3mimgdisplay`
    * Bump `pandoc` dependency to 2.11
    * Refactor `Patat.Presentation.Display` module to make it pure