Bump rubocop from 1.52.1 to 1.56.0

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.52.1 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@v1.52.1...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

@@ -69,6 +69,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
     ast (2.4.2)
+    base64 (0.1.1)
     bootsnap (1.16.0)
       msgpack (~> 1.2)
     brakeman (6.0.0)
@@ -97,6 +98,7 @@ GEM
       actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
     json (2.6.3)
+    language_server-protocol (3.17.0.3)
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -179,7 +181,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.8.1)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rollbar (3.4.0)
     rspec-core (3.12.2)
       rspec-support (~> 3.12.0)
@@ -198,14 +200,16 @@ GEM
       rspec-mocks (~> 3.12)
       rspec-support (~> 3.12)
     rspec-support (3.12.0)
-    rubocop (1.52.1)
+    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)