=== External library changes in 1.31 ===
==== Upgraded external libraries ====
-* Upgraded Moment.js from v2.15.0 to v2.19.3.
* …
==== New external libraries ====
* Use of Maintenance::error( $err, $die ) to exit script was deprecated. Use
Maintenance::fatalError() instead.
* Passing a ParserOptions object to OutputPage::parserOptions() is deprecated.
+* Browser support for Opera 12 and older was removed.
+ Opera 15+ continues at Grade A support.
+* …
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. There is experimental support for