Drop support for Ruby 3.0

.github/workflows/ruby.yml

@@ -10,7 +10,6 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.0'
           - '3.1'
           - '3.2'
           - '3.3'

.rubocop.yml

@@ -3,7 +3,7 @@ require:
 
 AllCops:
   NewCops: enable
-  TargetRubyVersion: 3.0
+  TargetRubyVersion: 3.1
 
 Layout/LineLength:
   Max: 120

conifer.gemspec

@@ -15,7 +15,7 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/hasghari/conifer'
   spec.license       = 'MIT'
 
-  spec.required_ruby_version = '>= 3.0'
+  spec.required_ruby_version = '>= 3.1'
   spec.metadata['rubygems_mfa_required'] = 'true'
 
   # Specify which files should be added to the gem when it is released.

lib/conifer.rb

@@ -18,8 +18,8 @@ def conifer(name, prefix: nil, dir: nil, format: :yml, method: ::File.basename(n
         return instance_variable_get("@conifer_#{method}") if instance_variable_defined?("@conifer_#{method}")
 
         instance_variable_set "@conifer_#{method}",
-                              Conifer::File.new(name, prefix: prefix, format: format,
-                                                      dir: dir, **options).tap(&:validate!)
+                              Conifer::File.new(name, prefix:, format:,
+                                                      dir:, **options).tap(&:validate!)
       end
 
       singleton ? define_singleton_method(method, &body) : define_method(method, &body)

spec/conifer/file_spec.rb

@@ -5,7 +5,7 @@
 
 RSpec.describe Conifer::File do
   subject(:file) do
-    described_class.new(name, dir: dir, format: format, prefix: prefix, permitted_classes: permitted_classes)
+    described_class.new(name, dir:, format:, prefix:, permitted_classes:)
   end
 
   let(:name) { :foo }