Add Ruby 2.1.0 to Travis config. Remove guard from development dependencies, so specs run under all supported Rubies.

.travis.yml

@@ -1,4 +1,5 @@
 rvm:
+  - 2.1.0
   - 2.0.0
   - 1.8.7
   - 1.9.2

Gemfile

@@ -1,2 +1,8 @@
 source 'http://rubygems.org'
+
+platforms :rbx do
+  gem 'rubysl', '~> 2.0'
+  gem 'rubinius-developer_tools'
+end
+
 gemspec

hashie.gemspec

@@ -17,7 +17,5 @@ Gem::Specification.new do |gem|
 
   gem.add_development_dependency 'rake', '~> 0.9.2'
   gem.add_development_dependency 'rspec', '~> 2.5'
-  gem.add_development_dependency 'guard'
-  gem.add_development_dependency 'guard-rspec'
   gem.add_development_dependency 'growl'
 end