Merge pull request #590 from github/jekyll-v3-7-4

Bump jekyll to v3.7.4

Author: parkr

lib/github-pages/dependencies.rb

@@ -7,7 +7,7 @@ module GitHubPages
   class Dependencies
     VERSIONS = {
       # Jekyll
-      "jekyll"                    => "3.7.3",
+      "jekyll"                    => "3.7.4",
       "jekyll-sass-converter"     => "1.5.2",
 
       # Converters