Updated sinatra dependency to be greater than 3.0

Author: micaelacunhadev

raddocs.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = ">= 1.3.6"
 
-  s.add_runtime_dependency "sinatra", "~> 3.0"
+  s.add_runtime_dependency "sinatra", ">= 3.0"
   s.add_runtime_dependency "haml", ">= 4.0"
   s.add_runtime_dependency "json"