Log Message:
Update ruby-rspec-expectations to 3.3.1.

### 3.3.1 / 2015-07-15
[Full Changelog](http://github.com/rspec/rspec-expectations/compare/v3.3.0...v3.3.1)

Bug Fixes:

* Fix `be >`, `be <`, etc so that it fails rather than allowing an
  argument error to be raised when compared against an object of the
  wrong type. This allows it to be used in composed matcher expressions
  against heterogeneous objects. (Dennis Günnewig, #809)
* Fix `respond_to` to work properly on target objects
  that redefine the `method` method. (unmanbearpig, #821)