prepare gemfile for rspec update
Convert specs to RSpec 2.14.7 syntax with Transpec

This conversion is done by Transpec 2.3.1 with the following command:
    transpec

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

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

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

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

* 7 conversions
    from: obj.should have(n).names
      to: expect(obj.names.size).to eq(n)

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

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

* 1 conversion
    from: lambda { }.should_not
      to: expect { }.not_to

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

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

For more details: https://github.com/yujinakayama/transpec#supported-conversions
update rspec syntax of cucumber steps