Log Message:
devel/difftastic: update to 0.29.0

0.29 (released 9th June 2022)
-Performance has improved in 0.29, and larger files typically see a 30%
 reduction in runtime.

Parsing
-Improved detection of binary files, including using /usr/share/mime/magic
 when available.
-Improved handling of comments and regexp literals in Perl.
-Added Elvish support.

Diffing
-Improved delimiter heuristics in lisp-like languages.

Display
-Difftastic now displays information about file renames. Previously, it would
 only show the new name.