Bump rubocop-rspec from 2.2.0 to 2.3.0

Bumps [rubocop-rspec](https://github.com/rubocop/rubocop-rspec) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/rubocop/rubocop-rspec/releases)
- [Changelog](https://github.com/rubocop/rubocop-rspec/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rspec@v2.2.0...v2.3.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile.lock

@@ -95,7 +95,7 @@ GEM
       rubocop (>= 0.90.0, < 2.0)
     rubocop-rake (0.5.1)
       rubocop
-    rubocop-rspec (2.2.0)
+    rubocop-rspec (2.3.0)
       rubocop (~> 1.0)
       rubocop-ast (>= 1.1.0)
     ruby-progressbar (1.11.0)