closure_tree.gemspec in closure_tree-4.5.0 vs closure_tree.gemspec in closure_tree-4.6.0

@@ -12,24 +12,23 @@
   gem.description = gem.summary
   gem.license = 'MIT'
 
   gem.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
   gem.test_files    = gem.files.grep(%r{^spec/})
+  gem.required_ruby_version     = '>= 1.9.3'
 
   gem.add_runtime_dependency 'activerecord', '>= 3.2.0'
   gem.add_runtime_dependency 'with_advisory_lock', '>= 0.0.9' # <- to prevent duplicate roots
 
   gem.add_development_dependency 'rake'
   gem.add_development_dependency 'yard'
-  gem.add_development_dependency 'rspec'
+  gem.add_development_dependency 'rspec', '~> 2.14.0' # FIXME: migrate to rspec 3 (or, better, ditch rspec and switch to minitest)
   gem.add_development_dependency 'rspec-instafail'
   gem.add_development_dependency 'rspec-rails' # FIXME: for rspec-rails and rspec fixture support
-  gem.add_development_dependency 'mysql2'
-  gem.add_development_dependency 'pg'
-  gem.add_development_dependency 'sqlite3'
   gem.add_development_dependency 'uuidtools'
   gem.add_development_dependency 'database_cleaner'
   gem.add_development_dependency 'appraisal'
+  gem.add_development_dependency 'timecop'
 
   # gem.add_development_dependency 'ruby-prof' # <- don't need this normally.
-  # TODO: gem 'activerecord-jdbcsqlite3-adapter', :platform => :jruby
+
 end