Bump rubocop-rails from 2.15.2 to 2.21.1

Bumps [rubocop-rails](https://github.com/rubocop/rubocop-rails) from 2.15.2 to 2.21.1.
- [Release notes](https://github.com/rubocop/rubocop-rails/releases)
- [Changelog](https://github.com/rubocop/rubocop-rails/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop-rails@v2.15.2...v2.21.1)

---
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

@@ -19,14 +19,16 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
     ast (2.4.2)
+    base64 (0.1.1)
     builder (3.2.4)
     concurrent-ruby (1.2.2)
     crass (1.0.6)
     diff-lcs (1.5.0)
     erubi (1.12.0)
     i18n (1.14.1)
       concurrent-ruby (~> 1.0)
-    json (2.6.2)
+    json (2.6.3)
+    language_server-protocol (3.17.0.3)
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -37,9 +39,10 @@ GEM
       racc (~> 1.4)
     nokogiri (1.15.4-x86_64-linux)
       racc (~> 1.4)
-    parallel (1.22.1)
-    parser (3.1.2.0)
+    parallel (1.23.0)
+    parser (3.2.2.3)
       ast (~> 2.4.1)
+      racc
     racc (1.7.1)
     rack (3.0.8)
     rails-dom-testing (2.2.0)
@@ -51,8 +54,8 @@ GEM
       nokogiri (~> 1.14)
     rainbow (3.1.1)
     rake (13.0.6)
-    regexp_parser (2.5.0)
-    rexml (3.2.5)
+    regexp_parser (2.8.1)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -66,33 +69,35 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.1)
-    rubocop (1.31.2)
+    rubocop (1.56.3)
+      base64 (~> 0.1.1)
       json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.1.0.0)
+      parser (>= 3.2.2.3)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 1.8, < 3.0)
       rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.18.0, < 2.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.19.1)
-      parser (>= 3.1.1.0)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.29.0)
+      parser (>= 3.2.1.0)
     rubocop-github (0.18.0)
       rubocop (>= 1.0.0)
       rubocop-performance
       rubocop-rails
     rubocop-performance (1.14.3)
       rubocop (>= 1.7.0, < 2.0)
       rubocop-ast (>= 0.4.0)
-    rubocop-rails (2.15.2)
+    rubocop-rails (2.21.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
-      rubocop (>= 1.7.0, < 2.0)
-    ruby-progressbar (1.11.0)
+      rubocop (>= 1.33.0, < 2.0)
+    ruby-progressbar (1.13.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unicode-display_width (2.2.0)
+    unicode-display_width (2.4.2)
 
 PLATFORMS
   arm64-darwin-21