Log Message:
devel/ruby-rspec-support: update to 3.8.0

### 3.8.0 / 2018-08-04
[Full Changelog](http://github.com/rspec/rspec-support/compare/v3.7.1...v3.8.0)

Bug Fixes:

* Order hash keys before diffing to improve diff accuracy when using mocked calls.
  (James Crisp, #334)