style(rubocop): fix all safe auto correctable offenses

app/jobs/send_webhook_job.rb

@@ -1,25 +1,25 @@
 class SendWebhookJob < Postal::Job
 
   def perform
-    if server = Server.find(params['server_id'])
+    if server = Server.find(params["server_id"])
       new_items = {}
-      if params['payload']
-        for key, value in params['payload']
-          if key.to_s =~ /\A\_(\w+)/
-            begin
-              new_items[$1] = server.message_db.message(value.to_i).webhook_hash
-            rescue Postal::MessageDB::Message::NotFound
-            end
+      if params["payload"]
+        for key, value in params["payload"]
+          next unless key.to_s =~ /\A_(\w+)/
+
+          begin
+            new_items[::Regexp.last_match(1)] = server.message_db.message(value.to_i).webhook_hash
+          rescue Postal::MessageDB::Message::NotFound
           end
         end
       end
 
       new_items.each do |key, value|
-        params['payload'].delete("_#{key}")
-        params['payload'][key] = value
+        params["payload"].delete("_#{key}")
+        params["payload"][key] = value
       end
 
-      WebhookRequest.trigger(server, params['event'], params['payload'])
+      WebhookRequest.trigger(server, params["event"], params["payload"])
     else
       log "Couldn't find server with ID #{params['server_id']}"
     end