Fix an error when running "bundle install" on Ruby 2.0.0

"bundle install" fails due to the following error: ``` Gem::InstallError: nokogiri requires Ruby version >= 2.1.0. ``` Because nokogiri gem dropped support for Ruby 2.0.0 on v1.7.0. ref. https://github.com/sparklemotion/nokogiri/blob/master/CHANGELOG.md#170--2016-12-26
yasaichi · Jan 31, 2017 · 0d74fcb · 0d74fcb
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diff --git a/Appraisals b/Appraisals
@@ -2,12 +2,18 @@ appraise "sprockets-rails 2 with sprockets 2" do
   gem "railties", "~> 4.0"
   gem "sprockets-rails", "~> 2.0"
   gem "sprockets", "~> 2.0"
+
+  # NOTE: nokogiri dropped support for Ruby 2.0.0 on v1.7.0
+  gem "nokogiri", "< 1.7.0"
 end
 
 appraise "sprockets-rails 2 with sprockets 3" do
   gem "railties", "~> 4.0"
   gem "sprockets-rails", "~> 2.0"
   gem "sprockets", "~> 3.0"
+
+  # NOTE: nokogiri dropped support for Ruby 2.0.0 on v1.7.0
+  gem "nokogiri", "< 1.7.0"
 end
 
 appraise "sprockets-rails 3 with sprockets 3" do

diff --git a/gemfiles/sprockets_rails_2_with_sprockets_2.gemfile b/gemfiles/sprockets_rails_2_with_sprockets_2.gemfile
@@ -5,6 +5,7 @@ source "https://rubygems.org"
 gem "railties", "~> 4.0"
 gem "sprockets-rails", "~> 2.0"
 gem "sprockets", "~> 2.0"
+gem "nokogiri", "< 1.7.0"
 
 group :development, :test do
   gem "pry-byebug"

diff --git a/gemfiles/sprockets_rails_2_with_sprockets_3.gemfile b/gemfiles/sprockets_rails_2_with_sprockets_3.gemfile
@@ -5,6 +5,7 @@ source "https://rubygems.org"
 gem "railties", "~> 4.0"
 gem "sprockets-rails", "~> 2.0"
 gem "sprockets", "~> 3.0"
+gem "nokogiri", "< 1.7.0"
 
 group :development, :test do
   gem "pry-byebug"