Update ruby-jekyll-watch to 2.2.1.
pkgsrc change: add "USE_LANGUAGES= # none".
2.2.1 / 2019-03-22
Bug Fixes
* Fix encoding discrepancy in excluded Windows paths (#76)
* Ignore directories rather than all similar paths (#65)
Development Fixes
* Test against Ruby 2.6
* Relax version constraint on bundler to allow using 1.x or 2.x
* dependencies: rubocop-jekyll 0.5
* style: target Ruby 2.4
2.1.2 / 2018-10-17
Development Fixes
* Initialize AppVeyor CI to test plugin on Windows (#77)
Bug Fixes
* Fix watcher failure due to incorrect file name encoding (#78)
2.1.1 / 2018-10-10
Bug Fixes
* Replace non-existent local variable (#73)
2.1.0 / 2018-10-09
Bug Fixes
* Normalize watched-path encoding (#69)
Development Fixes
* Test against Ruby 2.5 (#62)
* Drop support for Ruby 2.2 (EOL)
* Style: lint with rubocop-jekyll
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