Bump rubocop-rails from 2.9.1 to 2.21.0

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.9.1 to 2.21.0.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.9.1...v2.21.0)

---
updated-dependencies:
- dependency-name: rubocop-rails
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -83,7 +83,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.2.0)
+    concurrent-ruby (1.2.2)
     config (4.1.0)
       deep_merge (~> 1.2, >= 1.2.1)
       dry-validation (~> 1.0, >= 1.0.0)
@@ -185,7 +185,7 @@ GEM
     hashdiff (1.0.1)
     hashie (5.0.0)
     htmlentities (4.3.4)
-    i18n (1.12.0)
+    i18n (1.14.1)
       concurrent-ruby (~> 1.0)
     inch (0.8.0)
       pry
@@ -236,7 +236,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.2)
     mini_portile2 (2.8.1)
-    minitest (5.17.0)
+    minitest (5.20.0)
     multi_json (1.15.0)
     multi_xml (0.6.0)
     nenv (0.3.0)
@@ -282,9 +282,10 @@ GEM
     paper_trail (14.0.0)
       activerecord (>= 6.0)
       request_store (~> 1.4)
-    parallel (1.22.1)
-    parser (3.2.0.0)
+    parallel (1.23.0)
+    parser (3.2.2.3)
       ast (~> 2.4.1)
+      racc
     pg (1.4.4)
     pry (0.14.1)
       coderay (~> 1.1)
@@ -293,7 +294,7 @@ GEM
     puma (6.3.1)
       nio4r (~> 2.0)
     racc (1.6.2)
-    rack (2.2.6.4)
+    rack (2.2.8)
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)
@@ -343,14 +344,14 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
-    regexp_parser (2.6.2)
+    regexp_parser (2.8.1)
     remotipart (1.4.4)
     request_store (1.5.1)
       rack (>= 1.4)
     responders (3.0.1)
       actionpack (>= 5.0)
       railties (>= 5.0)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rinku (2.0.6)
     rspec (1.3.2)
     rspec-core (3.12.0)
@@ -371,8 +372,8 @@ GEM
       rubocop-ast (>= 1.23.0, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.24.1)
-      parser (>= 3.1.1.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
     rubocop-i18n (3.0.0)
       rubocop (~> 1.0)
     rubocop-minitest (0.26.1)
@@ -382,10 +383,10 @@ GEM
     rubocop-performance (1.15.0)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.9.1)
+    rubocop-rails (2.21.0)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 0.90.0, < 2.0)
+      rubocop (>= 1.33.0, < 2.0)
     rubocop-rails_config (1.11.3)
       railties (>= 5.0)
       rubocop (>= 1.29.0)
@@ -396,7 +397,7 @@ GEM
       rubocop-rails (~> 2.0)
     rubocop-rspec (2.13.2)
       rubocop (~> 1.33)
-    ruby-progressbar (1.11.0)
+    ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     sassc (2.4.0)
       ffi (~> 1.9)
@@ -446,7 +447,7 @@ GEM
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (2.0.5)
+    tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
@@ -469,7 +470,7 @@ GEM
     websocket-extensions (0.1.5)
     yard (0.9.28)
       webrick (~> 1.7.0)
-    zeitwerk (2.6.6)
+    zeitwerk (2.6.11)
 
 PLATFORMS
   ruby