Bump rubocop from 1.52.0 to 1.56.4

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.52.0 to 1.56.4.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.52.0...v1.56.4)

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

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

Gemfile.lock

@@ -132,6 +132,7 @@ GEM
     autoprefixer-rails (10.4.13.0)
       execjs (~> 2)
     awesome_print (1.9.2)
+    base64 (0.1.1)
     bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
       sassc (>= 2.0.0)
@@ -244,6 +245,7 @@ GEM
       thor (>= 0.14, < 2.0)
     json (2.6.3)
     jwt (2.7.0)
+    language_server-protocol (3.17.0.3)
     loofah (2.21.3)
       crass (~> 1.0.2)
       nokogiri (>= 1.12.0)
@@ -285,8 +287,9 @@ GEM
       sawyer (~> 0.9)
     os_map_ref (0.5.0)
     parallel (1.23.0)
-    parser (3.2.2.1)
+    parser (3.2.2.3)
       ast (~> 2.4.1)
+      racc
     pg (1.5.3)
     phonelib (0.8.2)
     poltergeist (1.18.1)
@@ -343,13 +346,13 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rbtree3 (0.7.1)
-    regexp_parser (2.8.0)
+    regexp_parser (2.8.1)
     rest-client (2.1.0)
       http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
-    rexml (3.2.5)
+    rexml (3.2.6)
     rspec (3.12.0)
       rspec-core (~> 3.12.0)
       rspec-expectations (~> 3.12.0)
@@ -374,14 +377,16 @@ GEM
       rspec-mocks (~> 3.10)
       rspec-support (~> 3.10)
     rspec-support (3.12.0)
-    rubocop (1.52.0)
+    rubocop (1.56.4)
+      base64 (~> 0.1.1)
       json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.0.0)
+      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 (>= 1.28.0, < 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)