retriable.gemspec in retriable-2.1.0 vs retriable.gemspec in retriable-3.0.0

@@ -17,14 +17,15 @@
   spec.files         = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = '>= 1.9.3'
+  spec.required_ruby_version = '>= 2.0.0'
 
-  spec.add_development_dependency "bundler", "~> 1.7"
-  spec.add_development_dependency "rake", "~> 10.4"
+  spec.add_development_dependency "bundler", "~> 1.13"
+  spec.add_development_dependency "rake", "~> 12.0"
 
-  spec.add_development_dependency "minitest", "~> 5.6"
+  spec.add_development_dependency "minitest", "~> 5.10"
   spec.add_development_dependency "guard"
   spec.add_development_dependency "guard-minitest"
+  spec.add_development_dependency "listen", "~> 3.1"
 end