config.ru in opal-0.7.2 vs config.ru in opal-0.8.0.beta1

@@ -2,10 +2,10 @@
 Bundler.require
 
 require 'mspec/opal/rake_task'
 
 ::Opal::Processor.arity_check_enabled = true
-::Opal::Processor.dynamic_require_severity = :raise
+::Opal::Processor.dynamic_require_severity = :error
 
 use Rack::ShowExceptions
 use Rack::ShowStatus
 use MSpec::Opal::Index
 run MSpec::Opal::Environment.new