==== 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.
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,