Bump rubocop from 0.69.0 to 0.71.0

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.69.0 to 0.71.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.69.0...v0.71.0)

Gemfile.lock

@@ -165,14 +165,14 @@ GEM
       rspec-mocks (~> 3.8.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
-    rubocop (0.69.0)
+    rubocop (0.71.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.6)
       rainbow (>= 2.2.2, < 4.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 1.7)
-    ruby-progressbar (1.10.0)
+    ruby-progressbar (1.10.1)
     rubyzip (1.2.2)
     selenium-webdriver (3.12.0)
       childprocess (~> 0.5)