Use transpec
Convert specs to RSpec 2.99.2 syntax with Transpec

This conversion is done by Transpec 2.3.6 with the following command:
    transpec

* 10 conversions
    from: obj.should_receive(:message)
      to: expect(obj).to receive(:message)

* 4 conversions
    from: Klass.any_instance.should_receive(:message)
      to: expect_any_instance_of(Klass).to receive(:message)

* 3 conversions
    from: obj.stub(:message)
      to: allow(obj).to receive(:message)

* 1 conversion
    from: RSpec.configure { |c| c.color_enabled = something }
      to: RSpec.configure { |c| c.color = something }

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Cleanup Guardfile
Upgrade RSpec 3.0.0
Merge pull request #5 from katsuma/upgrade_rspec3.0

Upgrade rspec3.0