Ruby 2.0.0 testing needs nokogiri version limited

.travis.yml

@@ -2,7 +2,6 @@ language: ruby
 sudo: required
 dist: trusty
 rvm:
-  - 2.0.0
   - 2.3.3
   - jruby-9.1.5.0
   - rbx-3.26
@@ -35,6 +34,8 @@ matrix:
           packages:
             - google-chrome-stable
             - awesome
+    - gemfile: gemfiles/Gemfile.ruby-20
+      rvm: 2.0.0
     - gemfile: gemfiles/Gemfile.ruby-19
       rvm: 1.9.3
     - gemfile: gemfiles/Gemfile.base-versions

gemfiles/Gemfile.ruby-20

@@ -0,0 +1,7 @@
+source 'https://rubygems.org'
+
+gem 'bundler', '~> 1.1'
+gemspec path: '..'
+
+gem 'xpath', :git => 'git://github.com/jnicklas/xpath.git'
+gem 'nokogiri', '< 1.7.0' # 1.7 requires ruby 2.1+