chore(deps): update gem spec list

- Jekyll 4.3.0 introduced `webrick` for Ruby 3.x
- Jekyll's dependency `nokogiri` does not yet support Ruby 3.2. See: https://github.com/sparklemotion/nokogiri/issues/2740/

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby: [2.7, 3]
+        ruby: ['2.7', '3.0', '3.1']
 
     steps:
       - name: Checkout

.github/workflows/pages-deploy.yml.hook

@@ -42,7 +42,7 @@ jobs:
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 3 # reads from a '.ruby-version' or '.tools-version' file if 'ruby-version' is omitted
+          ruby-version: '3.1' # reads from a '.ruby-version' or '.tools-version' file if 'ruby-version' is omitted
           bundler-cache: true
 
       - name: Build site

Gemfile

@@ -17,6 +17,3 @@ end
 
 # Performance-booster for watching directories on Windows
 gem "wdm", "~> 0.1.1", :install_if => Gem.win_platform?
-
-# Jekyll <= 4.2.0 compatibility with Ruby 3.0
-gem "webrick", "~> 1.7"

jekyll-theme-chirpy.gemspec

@@ -23,9 +23,9 @@ Gem::Specification.new do |spec|
     "plugin_type"       => "theme"
   }
 
-  spec.required_ruby_version = ">= 2.5"
+  spec.required_ruby_version = [">= 2.5", "< 3.2"]
 
-  spec.add_runtime_dependency "jekyll", "~> 4.1"
+  spec.add_runtime_dependency "jekyll", "~> 4.3"
   spec.add_runtime_dependency "jekyll-paginate", "~> 1.1"
   spec.add_runtime_dependency "jekyll-redirect-from", "~> 0.16"
   spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.7"