Log Message:
textproc/bat: Updates to 0.15.1

Changes since 0.15.0:

Bugfixes

  * Fix highlighting of Markdown files, see #963 and #977
  * Fix base16 theme (was broken since in v0.14), see #972, #934 and
    #979 (@mk12).
  * Users suffering from #865 ("no color for bat in ssh from a Windows
    client") can use the ansi-dark and ansi-light themes from now on.

New syntaxes

  * Fortran, see #957
  * Email (@mariozaizar)
  * QML, see #962 (@pylipp)