deps: add webrick

cgallegu · cgallegu · commit bba321808c99 · 2021-06-09T21:54:03.000-04:00
Ruby 3.0 no longer comes with webrick. issue: github/pages-gem#752
diff --git a/Gemfile b/Gemfile
@@ -2,3 +2,5 @@ source 'https://rubygems.org'
 gem 'json'
 gem 'github-pages', group: :jekyll_plugins
 gem 'jekyll-feed'
+
+gem "webrick", "~> 1.7"
