README.markdown in activity_feed-2.1.0 vs README.markdown in activity_feed-2.2.0

@@ -291,9 +291,11 @@
 ActivityFeed.full_feed(user_id, aggregate = ActivityFeed.aggregate)
 ActivityFeed.feed_between_timestamps(user_id, starting_timestamp, ending_timestamp, aggregate = ActivityFeed.aggregate)
 ActivityFeed.total_pages_in_feed(user_id, aggregate = ActivityFeed.aggregate, page_size = ActivityFeed.page_size)
 ActivityFeed.total_items_in_feed(user_id, aggregate = ActivityFeed.aggregate)
 ActivityFeed.trim_feed(user_id, starting_timestamp, ending_timestamp, aggregate = ActivityFeed.aggregate)
+ActivityFeed.expire_feed(user_id, seconds, aggregate = ActivityFeed.aggregate)
+ActivityFeed.expire_feed_at(user_id, timestamp, aggregate = ActivityFeed.aggregate)
 ActivityFeed.remove_feeds(user_id)
 ```
 
 ## Contributing to ActivityFeed
 
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