explicitly require postgres adapter (fixes combustion issues)

Gemfile

@@ -1,5 +1,3 @@
 source :rubygems
 
 gemspec
-# fix for failing tests with combustion 0.3.1 and rails 3.2.0
-gem "rails", "~> 3.1.0"

lib/activerecord-postgres-array/activerecord.rb

@@ -1,3 +1,5 @@
+require 'active_record/connection_adapters/postgresql_adapter'
+
 module ActiveRecord
   class ArrayTypeMismatch < ActiveRecord::ActiveRecordError
   end

spec/integration_spec.rb

@@ -37,7 +37,7 @@
       article.languages.should == ["\\","\""]
     end
   end
-  
+
   describe ".update" do
     before(:each) do
       @article = Article.create