Log Message:
mail/ruby-mime-types: update to 3.4.1

pkgsrc chnage: fix CATEGORIES from www to mail.

3.4.1 (2021-11-16)

1 bugfix:

* Fixed a Ruby < 2.3 incompatibility introduced by the use of standardrb,
  where <<- heredocs were converted to <<~ heredocs. These have been
  reverted back to <<- with the indentation kept and a .strip call to
  prevent excess whitespace.

3.4.0 (2021-11-15)

1 minor enhancement:

* Added a new field to MIME::Type for checking provisional registrations
  from IANA. [#157]

Documentation:

* Kevin Menard synced the documentation so that all examples are
  correct. #153

Administrivia:

* Added Ruby 3.0 to the CI test matrix. Added windows/jruby to the CI
  exclusion list; it refuses to run successfully.
* Removed the Travis CI configuration and changed it to Github Workflows
  #150. Removed Coveralls configuration.
* Igor Victor added TruffleRuby to the Travis CI configuration. #149
* Koichi ITO loosened an excessively tight dependency. #147
* Started using standardrb for Ruby formatting and validation.
* Moved deps:top functionality to a support file.