config.ru in sidekiq-prometheus-exporter-0.1.16

- old
+ new

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 require 'sidekiq'
 require 'sidekiq/prometheus/exporter'
 
 Sidekiq.configure_client do |config|
   config.redis = {url: 'redis://redis:6379/0'}