Updated gemspec debugger dependency to work with Ruby 1.9.x and 2.x versions

Author: bigtunacan

rails-jquery-autocomplete.gemspec

@@ -27,7 +27,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'uglifier'
   s.add_development_dependency 'rr'
   s.add_development_dependency 'simple_form',  '~>1.5'
-  s.add_development_dependency 'debugger'
+  s.add_development_dependency 'debugger' if RUBY_VERSION < '2.0.0'
+  s.add_development_dependency 'byebug' if RUBY_VERSION > '2.0.0'
 
   s.files         = Dir['lib/**/*'] + %w{CHANGELOG.md LICENSE README.md Rakefile}
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")