chore: update test setup

.ruby-version

@@ -1 +1 @@
-2.6.2
+3.0.1

dynamic_fields_for_rails.gemspec

@@ -14,15 +14,15 @@ Gem::Specification.new do |spec|
   spec.homepage      = 'https://github.com/mortik/dynamic_fields_for_rails'
   spec.license       = 'MIT'
 
-  spec.files         = `git ls-files`.split($INPUT_RECORD_SEPARATOR)
+  spec.files = Dir["{app,config,db,lib}/**/*", "LICENSE.txt", "Rakefile", "README.md"]
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 1.3', '> 1.3'
+  spec.add_development_dependency 'bundler', '~> 2.2', '> 1'
   spec.add_development_dependency 'mocha', '~> 1', '> 1'
   spec.add_development_dependency 'rake', '~> 13', '> 12'
   spec.add_development_dependency 'sqlite3', '~> 1', '> 1'
 
-  spec.add_dependency 'rails', '>= 3.0.0', '< 7.0.0'
+  spec.add_dependency 'rails', '>= 3.0.0', '< 8.0.0'
 end

test/test_helper.rb

@@ -1,19 +1,19 @@
 # frozen_string_literal: true
 
-require 'rubygems'
-require 'bundler/setup'
+# Configure Rails Environment
+ENV["RAILS_ENV"] = "test"
 
-ENV['RAILS_ENV'] = 'test'
-require File.expand_path('dummy/config/environment.rb', __dir__)
-require 'rails/test_help'
-require 'mocha/setup'
-require 'active_support/test_case'
-require 'active_support/inflector'
+require_relative "../test/dummy/config/environment"
+ActiveRecord::Migrator.migrations_paths = [File.expand_path("../test/dummy/db/migrate", __dir__)]
+require "rails/test_help"
 
-Rails.backtrace_cleaner.remove_silencers!
+require "rails/test_unit/reporter"
+Rails::TestUnitReporter.executable = 'bin/test'
 
-ENGINE_RAILS_ROOT = File.join(File.dirname(__FILE__), '../')
-
-# Load support files
-Dir[File.join(ENGINE_RAILS_ROOT, 'test/support/**/*.rb')].each { |f| require f }
-Dir[File.join(ENGINE_RAILS_ROOT, 'test/config/**/*.rb')].each { |f| require f }
+# Load fixtures from the engine
+if ActiveSupport::TestCase.respond_to?(:fixture_path=)
+  ActiveSupport::TestCase.fixture_path = File.expand_path("fixtures", __dir__)
+  ActionDispatch::IntegrationTest.fixture_path = ActiveSupport::TestCase.fixture_path
+  ActiveSupport::TestCase.file_fixture_path = ActiveSupport::TestCase.fixture_path + "/files"
+  ActiveSupport::TestCase.fixtures :all
+end