Add Ruby 3.0, 3.1, and 3.2 to CI

Removes obsolete and unused gems.  Replaces use of unmaintained files gem to allow running under Ruby 3.2.

Author: petergoldstein

.github/workflows/ci.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: ['2.7']
+        ruby: ['2.7', '3.0', '3.1', '3.2']
 
     steps:
       - name: Checkout

Gemfile

@@ -2,13 +2,12 @@ source 'https://rubygems.org'
 
 ruby '>= 2.4.0'
 
-gem 'activerecord', '>= 4.2.5', '< 6', require: false
+gem 'activerecord', '>= 4.2.5', '< 8', require: false
 gem 'rake', require: false
 
 group :development do
   gem 'bump'
   gem 'mg', require: false
-  gem 'travis', require: false
   platforms :mri, :mingw do
     gem 'yard', require: false
   end
@@ -25,11 +24,8 @@ group :development, :test do
   gem 'simplecov', require: false
   gem 'terminal-notifier-guard', require: false
 
-  gem 'codeclimate-test-reporter'
-  gem 'coveralls'
 
   gem 'overcommit'
-  gem 'ruby_dep', '1.5.0'
 
   platforms :mri, :mingw do
     gem 'pry', require: false
@@ -38,6 +34,5 @@ group :development, :test do
 end
 
 group :test do
-  gem 'files', require: false
   gem 'git', require: false
 end

spec/lib/annotate/annotate_models_spec.rb

@@ -3,7 +3,6 @@
 require 'annotate/annotate_models'
 require 'annotate/active_record_patch'
 require 'active_support/core_ext/string'
-require 'files'
 require 'tmpdir'
 
 describe AnnotateModels do
@@ -2014,18 +2013,15 @@ def mock_column(name, type, options = {})
 
     context 'when `model_dir` is valid' do
       let(:model_dir) do
-        Files do
-          file 'foo.rb'
-          dir 'bar' do
-            file 'baz.rb'
-            dir 'qux' do
-              file 'quux.rb'
-            end
-          end
-          dir 'concerns' do
-            file 'corge.rb'
-          end
-        end
+        dir = Dir.mktmpdir
+        FileUtils.touch(File.join(dir, 'foo.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'bar'))
+        FileUtils.touch(File.join(dir, 'bar', 'baz.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'bar', 'qux'))
+        FileUtils.touch(File.join(dir, 'bar', 'qux', 'quux.rb'))
+        FileUtils.mkdir_p(File.join(dir, 'concerns'))
+        FileUtils.touch(File.join(dir, 'concerns', 'corge.rb'))
+        dir
       end
 
       context 'when the model files are not specified' do