pluck_map.gemspec in pluck_map-1.0.0 vs pluck_map.gemspec in pluck_map-2.0.0.rc1

@@ -15,9 +15,12 @@
   spec.files         = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   spec.bindir        = "exe"
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ["lib"]
 
+  # uses `keyword_init` argument of `Struct.new`
+  spec.required_ruby_version = '>= 2.5.0'
+
   spec.add_dependency "activerecord", ">= 4.2"
 
   spec.add_development_dependency "appraisal"
   spec.add_development_dependency "bundler"
   spec.add_development_dependency "rake", "~> 10.0"