Merge pull request #259 from puppetlabs/maint/main/ci-add-ruby-3.4-4.0

(maint) Add Ruby 3.3, 3.4, and 4.0 to test matrix

.github/workflows/test.yml

@@ -21,6 +21,9 @@ jobs:
           - '3.0'
           - '3.1'
           - '3.2'
+          - '3.3'
+          - '3.4'
+          - '4.0'
 
     steps:
       - uses: actions/checkout@v4

Gemfile

@@ -7,6 +7,8 @@ gemspec
 gem 'rake', require: false
 
 group :test do
+  # base64 is a bundled gem in Ruby >= 3.4, so it must be declared explicitly.
+  gem 'base64'
   gem 'simplecov', '~> 0.22.0'
   gem 'simplecov-html', '~> 0.13.1'
   gem 'simplecov-lcov', '~> 0.8.0'

Gemfile.lock

@@ -11,6 +11,7 @@ GEM
     addressable (2.9.0)
       public_suffix (>= 2.0.2, < 8.0)
     ast (2.4.3)
+    base64 (0.3.0)
     bigdecimal (4.1.2)
     coderay (1.1.3)
     commander (5.0.0)
@@ -105,6 +106,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  base64
   pry
   rake
   rb-readline