New Features:
PHP
Add new actions for Composer (https://github.com/apache/netbeans/pull/2173)
Show `false` and `true` instead of `0` and `1` as boolean values in the Variables window of the debugger (https://github.com/apache/netbeans/pull/2178)
Improve/Fix code analysis features(e.g.https://github.com/apache/netbeans/pull/2246, https://github.com/apache/netbeans/pull/2249)
HTML
Update the validator.jar (https://github.com/apache/netbeans/pull/2217) It would be great if someone verifies it.
Enable the code template completion (https://github.com/apache/netbeans/pull/2253)
CSS
Add formatting options (https://github.com/apache/netbeans/pull/2257) only "Tabs And Indents"