Log Message:
Update to 3.56. From the changelog:

- added support for Sequence Alignment Maps (SAM files)
- added empty-file mode to `--no-trailing-nl`
  (https://gitlab.com/saalen/highlight/issues/147)
- fixed issue with `--syntax-by-name` waiting for stdin
  (https://gitlab.com/saalen/highlight/-/issues/151)
- fixed issue with `--syntax` reading matching files in the current
  working directory
  (https://gitlab.com/saalen/highlight/-/issues/151)
- fixed string parsing in lisp.lang
  (https://gitlab.com/saalen/highlight/-/issues/150)
- fixed output of UTF-8 text in xterm256 or truecolor output
  (https://gitlab.com/saalen/highlight/-/issues/152)
- fixed regex in js.lang (thanks to Jens Schleusener)
- fixed calculation of testcase markers with UTF-8 input
- allowed number literals with underscores in Java, Scala, D, Julia,
  C#, Perl and Ada definitions
- added Nord theme
  (https://gitlab.com/saalen/highlight/-/merge_requests/125)