feat: Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0 (#32871)

* feat: Update minimum Ruby to v3.2 and required dependencies for Ruby v4.0

PiperOrigin-RevId: 883373063

Source-Link: googleapis/googleapis@e1443bf

Source-Link: googleapis/googleapis-gen@8ecc70c
Copy-Tag: eyJwIjoiZ3JhZmVhcy8uT3dsQm90LnlhbWwiLCJoIjoiOGVjYzcwYzI5MjJjZmM0NjQ5YTA0NTRiYzhkMmUxZjNhNThhOWQ3OCJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

---------

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

grafeas/Gemfile

@@ -19,10 +19,12 @@ local_dependencies.each do |name|
   gem name, path: "../#{name}"
 end
 
-gem "google-style", "~> 1.30.1"
-gem "minitest", "~> 5.22"
+gem "google-style", "~> 1.32.0"
+gem "minitest", "~> 6.0.2"
 gem "minitest-focus", "~> 1.4"
+gem "minitest-mock", "~> 5.27"
 gem "minitest-rg", "~> 5.3"
+gem "ostruct", "~> 0.5.5"
 gem "rake", ">= 13.0"
 gem "redcarpet", "~> 3.6"
 gem "yard", "~> 0.9"

grafeas/grafeas.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
                       ["README.md", "LICENSE.md", ".yardopts", "MIGRATING.md"]
   gem.require_paths = ["lib"]
 
-  gem.required_ruby_version = ">= 3.0"
+  gem.required_ruby_version = ">= 3.2"
 
   gem.add_dependency "google-cloud-core", "~> 1.6"
   gem.add_dependency "grafeas-v1", ">= 0.14", "< 2.a"

grafeas/test/helper.rb

@@ -18,6 +18,7 @@
 
 require "minitest/autorun"
 require "minitest/focus"
+require "minitest/mock"
 require "minitest/rg"
 
 require "grpc"