Log Message:
Update ruby-rspec-support to 3.6.0.

### 3.6.0 / 2017-05-04
[Full Changelog](http://github.com/rspec/rspec-support/compare/v3.6.0.beta2...3.6.0)

Enhancements:

* Import `Source` classes from rspec-core. (Yuji Nakayama, #315)

### 3.6.0.beta2 / 2016-12-12
[Full \ 
Changelog](http://github.com/rspec/rspec-support/compare/v3.6.0.beta1...v3.6.0.beta2)

No user-facing changes.

### 3.6.0.beta1 / 2016-10-09
[Full Changelog](http://github.com/rspec/rspec-support/compare/v3.5.0...v3.6.0.beta1)

Bug Fixes:

* Prevent truncated formatted object output from mangling console codes. (#294, \ 
Anson Kelly)