Merge pull request #22 from praw-dev/change_log

Add change log entry for #20

CHANGES.rst

@@ -9,10 +9,17 @@ Unreleased
 * Ability to submit image galleries with :meth:`.submit_gallery`.
 * Ability to specify modmail mute duration.
 
+**Changed**
+
+* :class:`~.BoundedSet` will now utilize a Last-Recently-Used (LRU) storing mechanism,
+  which will change the order in which elements are removed from the set.
+
 **Fixed**
 
 * A bug where if you call `.parent()` on a comment it clears its replies.
 * An issue where performing a deepcopy on an :class:`.RedditBase` object will fail.
+* Some cases where streams yield the same item multiple times. This cannot be
+  prevented in every case.
 
 7.1.0 (2020/07/16)
 ------------------