Convert specs to RSpec 2.99.0.beta1 syntax with Transpec

This conversion is done by Transpec 1.6.1 with the following command:
    transpec -f -c rspec

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

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

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

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

* 28 conversions
    from: be_true
      to: be_truthy

* 17 conversions
    from: obj.should_not_receive(:message)
      to: expect(obj).not_to receive(:message)

* 14 conversions
    from: be_false
      to: be_falsey

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

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

* 2 conversions
    from: =~ /pattern/
      to: match(/pattern/)

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

* 1 conversion
    from: lambda { }.should_not
      to: expect { }.not_to
Specs passing on RSpec 3.0.0.beta1
Fix RSpec deprecation related to object scope
Update test-construct to maintained lib: test_construct