Bump rubocop from 0.80.1 to 0.81.0

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.80.1 to 0.81.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v0.80.1...v0.81.0)

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

Gemfile.lock

@@ -33,7 +33,7 @@ GEM
       ruby2_keywords (~> 0.0.1)
     nio4r (2.5.2)
     parallel (1.19.1)
-    parser (2.7.0.4)
+    parser (2.7.0.5)
       ast (~> 2.4.0)
     puma (4.3.3)
       nio4r (~> 2.0)
@@ -57,14 +57,14 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
     rspec-support (3.9.0)
-    rubocop (0.80.1)
+    rubocop (0.81.0)
       jaro_winkler (~> 1.5.1)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
       rexml
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
     rubocop-performance (1.5.2)
       rubocop (>= 0.71.0)
     rubocop-rspec (1.38.1)
@@ -97,7 +97,7 @@ GEM
       concurrent-ruby (~> 1.0)
     tzinfo-data (1.2019.3)
       tzinfo (>= 1.0.0)
-    unicode-display_width (1.6.1)
+    unicode-display_width (1.7.0)
     yajl-ruby (1.4.1)
 
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