Bump rubocop from 1.53.1 to 1.56.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.53.1 to 1.56.0.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.53.1...v1.56.0)

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

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

Gemfile.lock

@@ -84,6 +84,7 @@ GEM
     aws-eventstream (1.2.0)
     aws-sigv4 (1.5.2)
       aws-eventstream (~> 1, >= 1.0.2)
+    base64 (0.1.1)
     bcrypt (3.1.19)
     bindex (0.8.1)
     bootsnap (1.16.0)
@@ -286,17 +287,18 @@ GEM
     responders (3.1.0)
       actionpack (>= 5.2)
       railties (>= 5.2)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rouge (4.1.2)
-    rubocop (1.53.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
       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 (>= 1.28.0, < 2.0)
+      rubocop-ast (>= 1.28.1, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
     rubocop-ast (1.29.0)