Add an updateCheck frequency configuration. It defaults to weekly, but you can set it to always, daily, weekly, monthly or never.
Update to PHP Parser v3.0, with better PHP 7.1 support (Thanks @GrahamCampbell!)
Add support for language constructs (isset, unset, empty, etc) in the doc command.
Build a psysh-compat as well as psysh Phar. The second Phar contains polyfills for intl and readline. It's quite a bit bigger, but also quite a bit more useful for PHP installs without all the bells and whistles.
Fix "uninitialized string offset" in autocomplete matchers.
Prevent PHP's built-in webserver from hanging after debugging (Thanks @5tevan!)
Allow recursive static calls when defining classes.
Shrink compiled Phar size by ~10%.
Fix VarDumper truncating null bytes in output.
Add support for multiline comment input.
Catch invalid pass by reference arguments.
Better handling for Error in newer PHPs.
Better formatting for error output.
Build Phar with detect_unicode=Off if compiled under PHP 5.3, because PHP 5.3.
Various fixes for HHVM tests.
And a couple of things I'm prolly more excited about than you:
Test the lowest versions of all dependencies in CI. They're all currently failing, but it's a start :)