Dont be strict about rspec's version

knife-azure.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
   s.add_dependency(%q<rake>, ["~> 0.9.2.2"])
   s.add_dependency(%q<chef>, [">= 0.10.0"])
-  s.add_dependency(%q<rspec>, ["~> 2.8.0"])
+  s.add_dependency(%q<rspec>, [">= 2.8.0"])
   s.add_dependency(%q<rdoc>, ["~> 3.12"])
   s.add_dependency(%q<bundler>, [">= 0"])
   s.add_dependency(%q<guard-rspec>, [">= 0"])