travis fix
Convert specs to RSpec 3.1.4 syntax with Transpec

This conversion is done by Transpec 2.3.7 with the following command:
    transpec

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

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

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

* 8 conversions
    from: obj.should have(n).points
      to: expect(obj.points.size).to eq(n)

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

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

* 5 conversions
    from: lambda { }.should_not
      to: expect { }.not_to

* 4 conversions
    from: be_false
      to: be_falsey

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

* 3 conversions
    from: be_true
      to: be_truthy

* 3 conversions
    from: collection.should have(n).items
      to: expect(collection.size).to eq(n)

* 3 conversions
    from: obj.should have(n).fields
      to: expect(obj.fields.size).to eq(n)

* 1 conversion
    from: obj.should have(n).as_polar
      to: expect(obj.as_polar.size).to eq(n)

* 1 conversion
    from: obj.should have(n).bounding_box
      to: expect(obj.bounding_box.size).to eq(n)

* 1 conversion
    from: obj.should have(n).geometries
      to: expect(obj.geometries.size).to eq(n)

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