Fix rails 8 specs

Author: DarthSim

Gemfile

@@ -14,5 +14,5 @@ local_gemfile = "#{File.dirname(__FILE__)}/Gemfile.local"
 if File.exist?(local_gemfile)
   eval(File.read(local_gemfile)) # rubocop:disable Security/Eval
 else
-  gem "rails", "~> 7.0"
+  gem "rails", "~> 8.0"
 end

imgproxy-rails.gemspec

@@ -33,6 +33,6 @@ Gem::Specification.new do |s|
   s.add_development_dependency "rake", ">= 13.0"
   s.add_development_dependency "rspec", ">= 3.9"
   s.add_development_dependency "rspec-rails", ">= 4.0"
-  s.add_development_dependency "rails", "~> 7.0.3"
+  s.add_development_dependency "rails", "~> 8.0.0"
   s.add_development_dependency "image_processing", "~> 1.2"
 end

spec/internal_spec.rb

@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 require "rails_helper"
+require "ostruct"
 
 describe "Dummy app" do
   let(:option) { record }