style(rubocop): fix all safe auto correctable offenses

config/puma.rb

@@ -1,9 +1,9 @@
-require_relative '../lib/postal/config'
+require_relative "../lib/postal/config"
 threads_count = Postal.config.web_server&.max_threads&.to_i || 5
 threads         threads_count, threads_count
-bind_address  = Postal.config.web_server&.bind_address || '127.0.0.1'
-bind_port     = Postal.config.web_server&.port&.to_i || ENV['PORT'] || 5000
+bind_address  = Postal.config.web_server&.bind_address || "127.0.0.1"
+bind_port     = Postal.config.web_server&.port&.to_i || ENV["PORT"] || 5000
 bind            "tcp://#{bind_address}:#{bind_port}"
-environment     Postal.config.rails&.environment || 'development'
+environment     Postal.config.rails&.environment || "development"
 prune_bundler
 quiet false