Log Message:
devel/difftastic: update to 0.53.0

Parsing
 - Added support for SCSS.
 - Updated the Kotlin parser and improved handling of Kotlin nullable types.
 - .snap files (Jest snapshots) are now detected as JavaScript files.

Diffing
 - Fixed an issue where adding or removing blank lines would be ignored by the
   textual diffing logic.
 - Directory diffing now respects .gitignore files.
 - Directory diffing can now be sorted by path with the --sort-paths option.

Command Line Interface
 - Added the option --strip-cr. This removes all carriage return characters
   before diffing, which is helpful when dealing with a mix of Windows and
   non-Windows flies.
 - The option --skip-unchanged now has a corresponding environment option
   DFT_SKIP_UNCHANGED.

Build
 - Difftastic now requires Rust 1.60 to build.