Convert specs to RSpec 2.99.2 syntax with Transpec

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

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

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

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

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

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

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

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

* 12 conversions
    from: be_true
      to: be_truthy

* 8 conversions
    from: be_false
      to: be_falsey

* 6 conversions
    from: === expected
      to: be === expected

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

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

* 2 conversions
    from: pending
      to: skip

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

For more details: https://github.com/yujinakayama/transpec#supported-conversions
Added support for Spec >= 3.0.0 `hash_including` with AnyArgMatcher. i.e. hash_including(:a, :b => :c)
WebMock specs use Spec >= 3.1.0
Fixed deprecation notice in RSpec 3.1
Updated examples in README to RSpec 3 'expect' syntax.
Removed unused code.
Version 1.20.4