Bump rubocop from 1.53.1 to 1.56.3

Bumps [rubocop](https://github.com/rubocop/rubocop) from 1.53.1 to 1.56.3.
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rubocop/rubocop/compare/v1.53.1...v1.56.3)

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

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

Gemfile

@@ -24,7 +24,7 @@ gem 'espeak-ruby', '~> 1.1.0' # Text-to-Voice
 gem 'rake', '~> 13.0'
 gem 'otr-activerecord', '~> 2.1', '>= 2.1.2'
 gem 'sqlite3', '~> 1.6', '>= 1.6.1'
-gem 'rubocop', '~> 1.53.1', require: false
+gem 'rubocop', '~> 1.56.3', require: false
 
 # Geolocation support
 group :geoip do

Gemfile.lock

@@ -25,6 +25,7 @@ GEM
       async-io (~> 1.15)
     async-io (1.34.3)
       async
+    base64 (0.1.1)
     browserstack-local (1.4.3)
     byebug (11.1.3)
     capybara (3.39.2)
@@ -148,7 +149,8 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.12.0)
     rspec-support (3.12.0)
-    rubocop (1.53.1)
+    rubocop (1.56.3)
+      base64 (~> 0.1.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -156,7 +158,7 @@ GEM
       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)
@@ -258,7 +260,7 @@ DEPENDENCIES
   rdoc (~> 6.5)
   rest-client (~> 2.1.0)
   rspec (~> 3.12)
-  rubocop (~> 1.53.1)
+  rubocop (~> 1.56.3)
   rubyzip (~> 2.3)
   rushover (~> 0.3.0)
   selenium-webdriver (~> 4.12)