README.md in fluent-plugin-gcloud-pubsub-custom-1.2.0 vs README.md in fluent-plugin-gcloud-pubsub-custom-1.3.0

@@ -89,10 +89,12 @@
 - `max_total_size` (optional, default: `9800000` = `9.8MB`)
   - Publishing messages bytesize per request to Cloud Pub/Sub. This parameter affects only message size. You should specify a little smaller value than quota.
     - See https://cloud.google.com/pubsub/quotas#other_limits
 - `max_message_size` (optional, default: `4000000` = `4MB`)
   - Messages exceeding `max_message_size` are not published because Pub/Sub clients cannot receive it.
+- `attribute_keys` (optional, default: `[]`)
+  - Publishing the set fields as attributes.
 
 ### Pull messages
 
 Use `gcloud_pubsub` input plugin.
 
@@ -142,9 +144,11 @@
   - If `return_immediately` is `true` or pulling message is stopped by HTTP RPC, this plugin wait `pull_interval` each pull.
 - `pull_interval` (optional, default: `5.0`)
   - Pulling messages by intervals of specified seconds.
 - `pull_threads` (optional, default: `1`)
   - Set number of threads to pull messages.
+- `attribute_keys` (optional, default: `[]`)
+  - Specify the key of the attribute to be emitted as the field of record.
 - `parse_error_action` (optional, default: `exception`)
   - Set error type when parsing messages fails.
     - `exception`: Raise exception. Messages are not acknowledged.
     - `warning`: Only logging as warning.
 - `enable_rpc` (optional, default: `false`)