==== Upgraded external libraries ====
* Updated jquery.chosen from v0.9.14 to v1.8.2.
* Updated composer/spdx-licenses from 1.1.4 to
- 1.2.0 (development dependency).
+ 1.3.0 (development dependency).
* Updated nikic/php-parser from 2.1.0 to 3.1.3
(development dependency).
* Updated wikimedia/ip-set from 1.1.0 to 1.2.0.
* PreparedEdit->newText
* PreparedEdit->oldText
* PreparedEdit->pst
+* QuickTemplate::setRef() was deprecated in favour of QuickTemplate::set().
+ Setting template variables by reference allowed violating the principle of data being
+ immutable once added to the skin template. In practice, this method was not being
+ used for that. Rather, setRef() existed as memory optimisation for PHP 4.
+* Passing false to ParserOptions::setWrapOutputClass() is deprecated. Use the
+ 'unwrap' transform to ParserOutput::getText() instead.
+* ParserOutput objects generated using a non-default value for
+ ParserOptions::setWrapOutputClass() can no longer be added to the parser
+ cache.
+* The following deprecated methods from the OutputPage class have been removed:
+ * OutputPage::addExtensionStyle(); deprecated in 1.27
+ * OutputPage::getExtStyle(); deprecated in 1.27
+ * OutputPage::setETag(); deprecated in 1.28 (obsolete no-op)
+ * OutputPage::setSquidMaxage(); deprecated in 1.27
+ * OutputPage::readOnlyPage(); deprecated in 1.25
+ * OutputPage::rateLimited(); deprecated in 1.25
+* The no-op method Skin::showIPinHeader(), deprecated in 1.27, was removed.
== Compatibility ==
MediaWiki 1.31 requires PHP 5.5.9 or later. Although HHVM 3.18.5 or later is supported,