misc/ruby-launchy: update to 2.5.0

Update ruby-launchy to 2.5.0.
pkgsrc change: add "USE_LANGAUGES= # none".

## Version 2.5.0 - 2020-02-27

* Update depedencies
* Update minimum ruby level
* Move to `kde-open` on KDE - <https://github.com/copiousfreetime/launchy/pull/105> - wstephenson
* Applied some grammer / spelling fixes - <https://github.com/copiousfreetime/launchy/pull/130> - jeremymoritz
* `Pathname` instances do not raise exceptions when opening local files - <https://github.com/copiousfreetime/launchy/issues/101> - dmke
* Add a fallback console browsers - <https://github.com/copiousfreetime/launchy/issues/93> - trejkaz

(taca)