Loosen development dependency version constraints

Author: knu

huginn_agent.gemspec

@@ -18,11 +18,10 @@ Gem::Specification.new do |spec|
   spec.test_files    = Dir['spec/**/*']
   spec.require_paths = ["lib"]
 
-  spec.add_runtime_dependency 'thor'
-  spec.add_development_dependency "bundler", "~> 1.7"
-  spec.add_development_dependency "rake", "~> 10.0"
+  spec.add_runtime_dependency "thor"
+  spec.add_development_dependency "rake"
   spec.add_development_dependency "rspec", "~> 3.4"
-  spec.add_development_dependency "simplecov", "~> 0.11.2"
-  spec.add_development_dependency "guard", "~> 2.13.0"
-  spec.add_development_dependency "guard-rspec", "~> 4.6.5"
+  spec.add_development_dependency "simplecov"
+  spec.add_development_dependency "guard"
+  spec.add_development_dependency "guard-rspec"
 end