Enable rails 8

Gemfile

@@ -38,7 +38,7 @@ platforms :jruby do
   elsif ENV['RAILS_VERSION']
     gem 'railties', "~> #{ENV['RAILS_VERSION']}"
   else
-    gem 'railties', ['>= 3.0', '< 8.0']
+    gem 'railties', ['>= 3.0', '< 9.0']
   end
 end
 
@@ -59,8 +59,8 @@ group :test do
       gem 'rails-html-sanitizer', '< 1.4.0'
     end
   else
-    gem 'actionmailer', ['>= 3.0', '< 8.0']
-    gem 'activerecord', ['>= 3.0', '< 8.0']
+    gem 'actionmailer', ['>= 3.0', '< 9.0']
+    gem 'activerecord', ['>= 3.0', '< 9.0']
   end
   gem 'net-smtp' if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new('3.1.0')
   gem 'rspec', '>= 3'

delayed_job.gemspec

@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 
 Gem::Specification.new do |spec|
-  spec.add_dependency 'activesupport', ['>= 3.0', '< 8.0']
+  spec.add_dependency 'activesupport', ['>= 3.0', '< 9.0']
   spec.authors        = ['Brandon Keepers', 'Brian Ryckbost', 'Chris Gaffney', 'David Genord II', 'Erik Michaels-Ober', 'Matt Griffin', 'Steve Richert', 'Tobias Lütke']
   spec.description    = 'Delayed_job (or DJ) encapsulates the common pattern of asynchronously executing longer tasks in the background. It is a direct extraction from Shopify where the job table is responsible for a multitude of core tasks.'
   spec.email          = ['brian@collectiveidea.com']