Adds kramdown-parser-gfm dependency (daattali#697)

Author: lexicalunit

beautiful-jekyll-theme.gemspec

@@ -20,6 +20,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "jekyll", "~> 3.8"
   spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
   spec.add_runtime_dependency "jekyll-sitemap", "~> 1.4"
+  spec.add_runtime_dependency "kramdown-parser-gfm", "~> 1.1"
 
   spec.add_development_dependency "bundler", ">= 1.16"
   spec.add_development_dependency "rake", "~> 12.0"