Improve gemspec

Author: pboling

resque-unique_in_queue.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'colorize', '~> 0.8'
+  spec.add_runtime_dependency 'colorize', '>= 0.8'
   spec.add_runtime_dependency 'resque', '>= 1.2'
 
   spec.add_development_dependency 'bundler', '~> 1.16'