Rails 3.0.0 を Rails 3.2.13 にアップグレードする方法を教えてください。これは私の GemFile で、ここにどのような変更を加える必要がありますか?
# Edit this Gemfile to bundle your application's dependencies.
# This preamble is the current preamble for Rails 3 apps; edit as needed.
source 'http://rubygems.org'
gem 'eventmachine'
gem 'rails', '3.0.0'
#gem 'parseexcel'
gem 'will_paginate', ">=3.0.pre", :require => 'will_paginate'
gem 'gbarcode',:git =>'git://github.com/cameroncox/gbarcode.git',:branch =>'ruby1.9'
gem "pg"
gem "attr_encrypted"
gem "spreadsheet", "~> 0.7.5"
#gem "spreadsheet-excel"
#gem 'jquery-rails'
gem 'prototype_legacy_helper', '0.0.0', :git => 'git://github.com/rails/prototype_legacy_helper.git'
#gem "dynamic_form" this is for depricate the "error_message for " helper in rails 3
gem 'time_diff', '0.3.0'
gem "fastercsv"
gem 'rails-dev-boost', :git => 'git://github.com/thedarkone/rails-dev-boost.git', :require => 'rails_development_boost'
#gem "galetahub-simple_captcha", :require => "simple_captcha"