Loosen Jekyll requirement for jekyll/docker-jekyll -> jekyll/beta.

Author: Jordon Bedwell

jekyll-compose.gemspec

@@ -19,6 +19,6 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency "bundler", "~> 1.5"
   spec.add_development_dependency "rake", "~> 10.0"
-  spec.add_development_dependency "jekyll", "~> 2.0"
+  spec.add_development_dependency "jekyll", ">= 2.0"
   spec.add_development_dependency "rspec", "~> 3.0"
 end