Convert specs to RSpec 2.14.5 syntax with Transpec

This conversion is done by Transpec 1.5.0 with the following command:
    transpec -f --keep oneliner,have_items,its

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

* 19 conversions
    from: obj.stub(:message => value)
      to: allow(obj).to receive(:message).and_return(value)

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

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

* 1 conversion
    from: obj.should_not
      to: expect(obj).not_to
Update rspec