Add runtime dependency to Jekyll >= v2.5.0

Author: parkr

jekyll-compose.gemspec

@@ -17,8 +17,9 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
+  spec.add_dependency "jekyll", ">= 2.5.0"
+
   spec.add_development_dependency "bundler", "~> 1.5"
   spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "jekyll", ">= 2.5.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end