fix: Address CI issues and Rubocop violations

- Fix Rubocop style violations in Gemfile (alphabetical ordering)
- Fix Rubocop style violations in gemspec (extra spacing)
- Ensure Ruby 4.0 is properly configured in CI matrix
- Ruby 4.0.0 is confirmed available in GitHub Actions

Author: vipulnsward

Gemfile

@@ -5,8 +5,8 @@ source 'https://rubygems.org'
 # Ruby 3.4+ compatibility - these gems are no longer in stdlib
 gem 'base64'
 gem 'bigdecimal'
+gem 'cgi' # Required for Ruby 4.0+ compatibility
 gem 'mutex_m'
-gem 'cgi'  # Required for Ruby 4.0+ compatibility
 
 gem 'byebug'
 gem 'rake'

uploadcare-ruby.gemspec

@@ -43,7 +43,7 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.required_ruby_version = '>= 3.0'  # Tested with Ruby 3.0 through 4.0
+  spec.required_ruby_version = '>= 3.0' # Tested with Ruby 3.0 through 4.0
 
   spec.add_dependency 'addressable', '~> 2.8'
   spec.add_dependency 'faraday', '~> 2.12'