adjust required ruby version and ruby ci versions

Author: geemus

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
 
     strategy:
       matrix:
-        ruby-version: ['3.0', '3.1', '3.2', '3.3', 'head']
+        ruby-version: ['3.1', '3.2', '3.3', '3.4', '4.0', 'head']
     continue-on-error: ${{ matrix.ruby-version == 'head' }}
 
     steps:

fog-core.gemspec

@@ -18,7 +18,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
-  spec.required_ruby_version = ">= 2.0"
+  spec.required_ruby_version = ">= 3.0"
 
   spec.add_dependency("builder")
   spec.add_dependency("excon", "~> 1.0")