==== Changed external libraries ====
* Updated OOUI from v0.29.2 to v0.30.2.
* Updated OOjs Router from pre-release to v0.2.0.
-* Updated wikimedia/xmp-reader from 0.6.0 to 0.6.1.
+* Updated wikimedia/xmp-reader from 0.6.0 to 0.6.2.
* Updated wikimedia/scoped-callback from 2.0.0 to 3.0.0.
* Updated wikimedia/ip-set from 1.2.0 to 2.0.1.
* The deprecated IPSet\IPSet alias was removed, Wikimedia\IPSet must be
* Updated nikic/php-parser from 3.1.3 to 3.1.5 (dev-only).
* Updated pear/net_smtp from 1.8.0 to 1.8.1.
* Updated cssjanus/cssjanus from 1.2.0 to 1.2.1.
+* Updated wikimedia/php-session-serializer from 1.0.6 to 1.0.7.
==== Removed external libraries ====
=== Bug fixes in 1.33 ===
* (T164211) Special:UserRights could sometimes fail with a
"conflict detected" error when there weren't any conflicts.
+ * (T215566) Unable to determine if the database exists
+ during a fresh installation.
=== Action API changes in 1.33 ===
* (T198913) Added 'ApiOptions' hook.