update dev dependencies

Gemfile

@@ -4,19 +4,18 @@ gemspec
 group 'development' do
   gem 'rake'
   gem 'redgreen', '~> 1.2'
-  gem 'shoulda', '~> 3.3.2'
-  gem 'rr', '~> 1.0.5'
-  gem 'cucumber', '~> 1.2.1'
+  gem 'shoulda', '~> 3.5'
+  gem 'rr', '~> 1.1'
+  gem 'cucumber', '~> 1.3'
   gem 'RedCloth', '~> 4.2'
   gem 'rdiscount', '~> 1.6'
-  gem 'redcarpet', '~> 2.2.2'
+  gem 'redcarpet', '~> 3.0'
   gem 'launchy', '~> 2.1.2'
 
   gem 'unicode_utils'
 end
 
 group :debug do
-  gem 'ruby-debug', :require => false, :platform => :jruby
   gem 'debugger', '~>1.6', :require => false, :platform => :mri
   gem 'rubinius-compiler', '~>2.0', :require => false, :platform => :rbx
   gem 'rubinius-debugger', '~>2.0', :require => false, :platform => :rbx

jekyll-scholar.gemspec

@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
 
   s.add_runtime_dependency('jekyll', '~> 1.0')
   s.add_runtime_dependency('citeproc-ruby', '~> 0.0.6')
-  s.add_runtime_dependency('bibtex-ruby', '~> 2.3')
+  s.add_runtime_dependency('bibtex-ruby', '~> 3.0')
 
   s.files        = `git ls-files`.split("\n")
   s.test_files   = `git ls-files -- {test,spec,features}/*`.split("\n")