Bump rubocop from 1.55.1 to 1.56.0 (#2807)

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.55.1 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@v1.55.1...v1.56.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile

@@ -8,7 +8,7 @@ gemspec
 gem 'minitest', '5.19.0'
 gem 'pry', '0.14.2'
 gem 'rake', '13.0.6'
-gem 'rubocop', '1.55.1'
+gem 'rubocop', '1.56.0'
 gem 'rubocop-minitest', '0.31.0'
 gem 'rubocop-rake', '0.6.0'
 gem 'simplecov', '0.22.0'

Gemfile.lock

@@ -8,6 +8,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
+    base64 (0.1.1)
     coderay (1.1.3)
     concurrent-ruby (1.2.2)
     docile (1.4.0)
@@ -30,7 +31,8 @@ GEM
     rake (13.0.6)
     regexp_parser (2.8.1)
     rexml (3.2.6)
-    rubocop (1.55.1)
+    rubocop (1.56.0)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -68,7 +70,7 @@ DEPENDENCIES
   minitest (= 5.19.0)
   pry (= 0.14.2)
   rake (= 13.0.6)
-  rubocop (= 1.55.1)
+  rubocop (= 1.56.0)
   rubocop-minitest (= 0.31.0)
   rubocop-rake (= 0.6.0)
   simplecov (= 0.22.0)