Use 1.99 version of rdf.

Author: gkellogg

rdf-spec.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |gem|
 
   gem.required_ruby_version      = '>= 1.9.2'
   gem.requirements               = []
-  gem.add_runtime_dependency     'rdf',       '~> 1.1'
+  gem.add_runtime_dependency     'rdf',       '~> 1.99'
   gem.add_runtime_dependency     'rspec',     '~> 3.0'
   gem.add_runtime_dependency     'rspec-its', '~> 1.0'
   gem.add_runtime_dependency     'webmock',   '~> 1.17'