run specs on ruby 3.1 (#105)

Author: kasif-adnan

.github/workflows/ci.yml

@@ -4,14 +4,14 @@ on:
   pull_request:
   push:
     branches:
-      - master
+      - main
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby: [ '2.5', '2.6', '2.7', '3.0']
+        ruby: [ '2.6', '2.7', '3.0', '3.1' ]
     name: Lint & Test with Ruby ${{ matrix.ruby }}
     steps:
       - uses: actions/checkout@v2

kitchen-hyperv.gemspec

@@ -16,6 +16,8 @@ Gem::Specification.new do |spec|
   spec.files         = %w{LICENSE kitchen-hyperv.gemspec Gemfile Rakefile support/hyperv.ps1} + Dir.glob("lib/**/*")
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = ">= 2.6"
+
   spec.add_development_dependency "rake"
   spec.add_development_dependency "minitest", "~> 5.3", "< 5.16"
   spec.add_development_dependency "minitest-stub-const"