Bump rubocop from 0.66.0 to 0.67.1 (#117)

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.66.0 to 0.67.1.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.66.0...v0.67.1)

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

Gemfile.lock

@@ -104,8 +104,8 @@ GEM
     nokogiri (1.10.2-java)
     octokit (4.13.0)
       sawyer (~> 0.8.0, >= 0.5.3)
-    parallel (1.14.0)
-    parser (2.6.0.0)
+    parallel (1.17.0)
+    parser (2.6.2.0)
       ast (~> 2.4.0)
     pry (0.12.2)
       coderay (~> 1.1.0)
@@ -169,7 +169,7 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
-    rubocop (0.66.0)
+    rubocop (0.67.1)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.5, != 2.5.1.1)