docker: update alpine Docker tag to v3.22.3

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](https://github.com/rubocop/rubocop/compare/v1.82.0...v1.84.0)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.84.0
  dependency-type: direct:development
...

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

.github/workflows/ci.yml

@@ -19,9 +19,9 @@ jobs:
       matrix:
         ruby-version:
         - '3.1'
-        - '3.2'
         - '3.3'
         - '3.4'
+        - '4.0'
     steps:
     - uses: actions/checkout@v6
     - name: Set up Ruby ${{ matrix.ruby-version }}

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 3.13.0
+
+IMPROVEMENTS:
+
+- add Ruby 4.0 support
+
 ## 3.12.0 (December 4th, 2025)
 
 IMPROVEMENTS:

Rakefile

@@ -16,7 +16,7 @@ end
 hadolint_version = 'v2.14.0'
 
 # renovate: datasource=github-tags depName=aquasecurity/trivy
-trivy_version = 'v0.67.0'
+trivy_version = 'v0.68.2'
 
 namespace :docker do
   ci_image = 'cmur2/dyndnsd:ci'

docker/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.22.2
+FROM alpine:3.22.3
 
 EXPOSE 5353 8080
 

docker/ci/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.22.2
+FROM alpine:3.22.3
 
 EXPOSE 5353 8080
 

dyndnsd.gemspec

@@ -44,8 +44,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency 'rack-test'
   s.add_development_dependency 'rake'
   s.add_development_dependency 'rspec'
-  s.add_development_dependency 'rubocop', '~> 1.81.1'
+  s.add_development_dependency 'rubocop', '~> 1.84.0'
   s.add_development_dependency 'rubocop-rake', '~> 0.7.1'
-  s.add_development_dependency 'rubocop-rspec', '~> 3.8.0'
-  s.add_development_dependency 'solargraph', '~> 0.55.0'
+  s.add_development_dependency 'rubocop-rspec', '~> 3.9.0'
+  s.add_development_dependency 'solargraph', '~> 0.58.1'
 end