Bump rubocop from 0.79.0 to 0.84.0

Bumps [rubocop](https://github.com/rubocop-hq/rubocop) from 0.79.0 to 0.84.0.
- [Release notes](https://github.com/rubocop-hq/rubocop/releases)
- [Changelog](https://github.com/rubocop-hq/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop-hq/rubocop/compare/v0.79.0...v0.84.0)

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

Gemfile.lock

@@ -25,7 +25,6 @@ GEM
       gettext (>= 3.0.2, < 3.3.0)
       locale
     hiera (3.6.0)
-    jaro_winkler (1.5.4)
     json (2.3.0)
     json-schema (2.8.1)
       addressable (>= 2.4)
@@ -41,7 +40,7 @@ GEM
     necromancer (0.5.1)
     os (1.1.0)
     parallel (1.19.1)
-    parser (2.7.0.1)
+    parser (2.7.1.2)
       ast (~> 2.4.0)
     pastel (0.7.3)
       equatable (~> 0.6)
@@ -107,6 +106,7 @@ GEM
       puppet_forge (~> 2.3.0)
     rainbow (3.0.0)
     rake (13.0.1)
+    rexml (3.2.4)
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
@@ -122,13 +122,16 @@ GEM
     rspec-puppet (2.7.8)
       rspec
     rspec-support (3.9.0)
-    rubocop (0.79.0)
-      jaro_winkler (~> 1.5.1)
+    rubocop (0.84.0)
       parallel (~> 1.10)
       parser (>= 2.7.0.1)
       rainbow (>= 2.2.2, < 4.0)
+      rexml
+      rubocop-ast (>= 0.0.3)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-ast (0.0.3)
+      parser (>= 2.7.0.1)
     ruby-progressbar (1.10.1)
     rugged (1.0.0)
     semantic_puppet (1.0.2)
@@ -152,7 +155,7 @@ GEM
       tty-screen (~> 0.7)
       wisper (~> 2.0.0)
     tty-screen (0.7.1)
-    unicode-display_width (1.6.0)
+    unicode-display_width (1.7.0)
     wisper (2.0.1)
     xmlrpc (0.3.0)
     yamllint (0.0.9)
@@ -182,7 +185,7 @@ DEPENDENCIES
   puppetlabs_spec_helper (~> 2.3)
   r10k (~> 3.5)
   rspec-puppet (~> 2.6)
-  rubocop (~> 0.79)
+  rubocop (~> 0.84)
   rugged (~> 1.0)
   tty-command (~> 0.6)
   tty-file (~> 0.9)