test(travis): Limit compatibility to Ruby 2.0+

.travis.yml

@@ -1,7 +1,4 @@
 language: ruby
 rvm:
- - '1.8.7'
- - '1.9.2'
- - '1.9.3'
- - '2.2.1'
- - rbx
+ - 2.1
+ - 2.0

Gemfile

@@ -1,7 +1,5 @@
 source 'http://rubygems.org'
 
-ruby '2.2.1'
-
 gem 'algoliasearch', '~> 1.4'
 gem 'awesome_print', '~> 1.6'
 gem 'json', '~> 1.8'
@@ -9,7 +7,7 @@ gem 'nokogiri', '~> 1.6'
 
 group :development do
   gem 'guard-rspec', '~> 4.6'
-  gem 'jekyll', '~> 2.5'
+  gem 'jekyll', '~> 2.5' # Jekyll custom commands only available from 2.5
   gem 'jeweler', '~> 2.0'
   gem 'rspec', '~> 3.0'
   gem 'rubocop', '~> 0.31'

README.md

@@ -131,6 +131,11 @@ class AlgoliaSearchRecordExtractor
 end
 ```
 
+## Dependencies
+
+The `algoliasearch-jekyll` plugin works form versions of Jekyll starting from
+2.5, with a version of Ruby of at least 2.0.
+
 ## Searching
 
 This plugin will only index your data in your Algolia index. Adding search

Rakefile

@@ -23,6 +23,9 @@ Jeweler::Tasks.new do |gem|
                     '`jekyll algolia push`'
   gem.email = 'tim@pixelastic.com'
   gem.authors = ['Tim Carry']
+
+  gem.required_ruby_version = '2.0'
+
   # dependencies defined in Gemfile
 end
 Jeweler::RubygemsDotOrgTasks.new

scripts/test_full

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+source ~/.rvm/scripts/rvm
+
+(rvm use 2.0 || rvm install ruby-2.0) && \
+  rake && \
+  (rvm use 2.1 || rvm install ruby-2.1) && \
+  rake