Log Message:
devel/ruby-rspec-expectations: update to 3.9.1

Update ruby-rspec-expectations to 3.9.1.

### 3.9.1 / 2020-03-13
[Full Changelog](http://github.com/rspec/rspec-expectations/compare/v3.9.0...v3.9.1)

Bug Fixes:

* Issue an improved warning when using `respond_to(...).with(n).arguments` and ignore
  the warning when using with `have_attributes(...)`. (Jon Rowe, #1164)