Update simplecov dependency to ~> 0.9.0

Gemfile

@@ -7,9 +7,9 @@ gemspec
 gem 'rake', '~> 10.1'
 
 group :test do
-  gem 'coveralls', '~> 0.7.0', :require => false
+  gem 'coveralls', '~> 0.7.0'
   gem 'rspec',     '~> 2.14'
-  gem 'simplecov', '~> 0.8.2', :require => false
+  gem 'simplecov', '~> 0.9.0'
 end
 
 platforms :ruby_18, :jruby do

spec/spec_helper.rb

@@ -1,21 +1,18 @@
 # encoding: utf-8
 
-require 'simplecov'
-require 'coveralls'
-
-SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter[
-  SimpleCov::Formatter::HTMLFormatter,
-  Coveralls::SimpleCov::Formatter
-]
-
-SimpleCov.start do
-  command_name 'spec'
-
-  add_filter 'config'
-  add_filter 'spec'
-  add_filter 'vendor'
-
-  minimum_coverage 100
+if RUBY_VERSION >= '1.9'
+  require 'simplecov'
+  require 'coveralls'
+
+  SimpleCov.formatters = [SimpleCov::Formatter::HTMLFormatter, Coveralls::SimpleCov::Formatter]
+
+  SimpleCov.start do
+    add_filter '/config'
+    add_filter '/spec'
+    add_filter '/vendor'
+    command_name 'spec'
+    minimum_coverage 100
+  end
 end
 
 require 'memoizable'