Log Message:
devel/ruby-rspec-mocks: update to 3.7.0

### 3.7.0 / 2017-10-17
[Full Changelog](http://github.com/rspec/rspec-mocks/compare/v3.6.0...v3.7.0)

Enhancements:

* Improve compatibility with `--enable-frozen-string-literal` option
  on Ruby 2.3+. (Pat Allan, #1165)

Bug Fixes:

* Fix `hash_including` and `hash_excluding` so that they work against
  subclasses of `Hash`. (Aaron Rosenberg, #1167)