Bump ruby version to >= 2.0

.ruby-gemset

@@ -1 +1 @@
-fog-xenserver
+fog-xenserver

.ruby-version

@@ -1 +1 @@
-2.1.2
+2.4.3

.travis.yml

@@ -3,24 +3,11 @@ before_install:
 
 matrix:
   include:
-    - rvm: 1.8.7
-      gemfile: gemfiles/Gemfile.1.9.2-
-    - rvm: 1.9.2
-      gemfile: gemfiles/Gemfile.1.9.2-
-    - rvm: 1.9.3
-      gemfile: gemfiles/Gemfile.1.9.2+
-    - rvm: 2.0.0
-      gemfile: gemfiles/Gemfile.1.9.2+
-    - rvm: 2.1.10
-      gemfile: gemfiles/Gemfile.1.9.2+
-    - rvm: 2.2.6
-      gemfile: gemfiles/Gemfile.1.9.2+
-    - rvm: 2.3.3
-      gemfile: gemfiles/Gemfile.1.9.2+
-    - rvm: 2.4.0
-      gemfile: gemfiles/Gemfile.1.9.2+
+    - rvm: 2.0
+    - rvm: 2.1
+    - rvm: 2.2
+    - rvm: 2.3
+    - rvm: 2.4
       env: COVERAGE=true
-    - rvm: ree
-      gemfile: gemfiles/Gemfile.1.9.2-
+    - rvm: 2.5
     - rvm: jruby
-      gemfile: gemfiles/Gemfile.1.9.2+

fog-xenserver.gemspec

@@ -22,21 +22,17 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = %w(lib)
 
+  spec.required_ruby_version = '>= 2.0'
+
   spec.add_dependency 'fog-xml'
   spec.add_dependency 'fog-core'
   spec.add_dependency 'xmlrpc' if RUBY_VERSION =~ /^2\.[^0-3].*$/
 
   spec.add_development_dependency 'coveralls'
-  spec.add_development_dependency 'json' if RUBY_VERSION =~ /^1\.8.*$/
   spec.add_development_dependency 'minitest'
   spec.add_development_dependency 'rake'
-  spec.add_development_dependency 'pry'
+  spec.add_development_dependency 'jazz_fingers'
   spec.add_development_dependency 'turn'
   spec.add_development_dependency 'webmock'
-
-  if RUBY_VERSION =~ /^1\.(8.*|9.[0-2])$/
-    spec.add_development_dependency 'vcr', '< 3.0.0'
-  else
-    spec.add_development_dependency 'vcr'
-  end
+  spec.add_development_dependency 'vcr'
 end

spec/minitest_helper.rb

@@ -1,5 +1,8 @@
+$VERBOSE = nil
+
 require 'minitest/spec'
 require 'minitest/autorun'
+require 'jazz_fingers'
 require 'turn'
 require 'vcr'