Update rubocop requirement from = 1.55.1 to = 1.56.0

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.
- [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:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -18,6 +18,7 @@ GEM
       minitest (>= 5.1)
       tzinfo (~> 2.0)
     ast (2.4.2)
+    base64 (0.1.1)
     better_html (2.0.1)
       actionview (>= 6.0)
       activesupport (>= 6.0)
@@ -66,7 +67,8 @@ 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)
@@ -106,7 +108,7 @@ DEPENDENCIES
   minitest (~> 5.19.0)
   mocha (~> 2.1.0)
   rake (~> 13.0.6)
-  rubocop (= 1.55.1)
+  rubocop (= 1.56.0)
   rubocop-github (~> 0.20.0)
 
 BUNDLED WITH

erblint-github.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "mocha", "~> 2.1.0"
   s.add_development_dependency "rake", "~> 13.0.6"
 
-  s.add_development_dependency "rubocop", "= 1.55.1"
+  s.add_development_dependency "rubocop", "= 1.56.0"
   s.add_development_dependency "rubocop-github", "~> 0.20.0"
   s.metadata["rubygems_mfa_required"] = "true"