Fix rubocop errors

Author: mfinelli

.rubocop.yml

@@ -10,6 +10,9 @@ AllCops:
 Gemspec/RequireMFA:
   Enabled: false
 
+Gemspec/DevelopmentDependencies:
+  EnforcedStyle: gemspec
+
 Layout/ExtraSpacing:
   AllowForAlignment: false
 

bankrupt.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |spec|
   spec.description = 'Load files from local disk or from a CDN in production.'
   spec.homepage = 'https://github.com/mfinelli/bankrupt'
   spec.license = 'Apache-2.0'
-  spec.required_ruby_version = '>= 2.5.0'
+  spec.required_ruby_version = '>= 3.2.0'
 
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})