updated test config
update rspec to 3
Convert specs to RSpec 3.0.1 syntax with Transpec

This conversion is done by Transpec 2.3.0 with the following command:
    transpec

* 70 conversions
    from: obj.should
      to: expect(obj).to

* 55 conversions
    from: == expected
      to: eq(expected)

* 5 conversions
    from: obj.should_not
      to: expect(obj).not_to

* 3 conversions
    from: lambda { }.should
      to: expect { }.to

* 2 conversions
    from: be_true
      to: be_truthy

* 1 conversion
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)

For more details: https://github.com/yujinakayama/transpec#supported-conversions
version 4.6.1