Bump rspec-rails from 3.7.2 to 3.8.0

[dependabot-preview]

Bumps rspec-rails from 3.7.2 to 3.8.0.

Changelog

Sourced from rspec-rails's changelog.

3.8.0 / 2018-08-04

Full Changelog

Enhancements:

• Improved message when migrations are pending in the default rails_helper.rb
  (Koichi ITO, #1924)
• have_http_status matcher now supports Rails 5.2 style response symbols
  (Douglas Lovell, #1951)
• Change generated Rails helper to match Rails standards for Rails.root
  (Alessandro Rodi, #1960)
• At support for asserting enqueued jobs have no wait period attached.
  (Brad Charna, #1977)
• Cache instances of ActionView::Template used in stub_template resulting
  in increased performance due to less allocations and setup. (Simon Coffey, #1979)
• Rails scaffold generator now respects longer namespaces (e.g. api/v1/<thing>).
  (Laura Paakkinen, #1958)

Bug Fixes:

• Escape quotation characters when producing method names for system spec
  screenshots. (Shane Cavanaugh, #1955)
• Use relative path for resolving fixtures when fixture_path is not set.
  (Laurent Cobos, #1943)
• Allow custom template resolvers in view specs. (ahorek, #1941)

Commits

• 0addc2e Release 3.8.0.
• bd4c686 Update changelog for 3.8 release.
• f685b44 Correct arguments post improvements for #2015
• 5da6e2a Provide more complex example for #2015
• 30426ce Slight wording change post #2015
• d6e6cf6 Merge pull request #2015 from SzNagyMisu/m_pr
• 5e0bdcd Documentation for have_enqueued_job (#1576)
• 2f25700 Merge pull request #2014 from composerinteralia/deprecated-success
• 436b9d0 Avoid deprecated TestResponse#success? method
• 814b377 Change minimum Ruby version for Puma to 2.2 + specify rdoc version under 2.2 ...
• Additional commits viewable in compare view

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