* Updated composer/xdebug-handler to 2.0 which adds supports for Xdebug 3
* Fixed handling of inline-update-constraints with references or stability flags (#9847)
* Fixed async processes erroring in an unclear way when they failed to start (#9808)
* Fixed support for the upcoming Symfony 6.0 release when Composer is installed as a library (#9896)
* Fixed progress output missing newlines on PowerShell, and disable progress output by default when CI env var is present (#9621)
* Fixed support for Vagrant/VirtualBox filesystem slowness when installing binaries from packages (#9627)
* Fixed type annotations for the InstalledVersions class
* Deprecated InstalledVersions::getRawData in favor of InstalledVersions::getAllRawData (#9816)
### [2.0.13] 2021-04-27
* Security: Fixed command injection vulnerability in HgDriver/HgDownloader and hardened other VCS drivers and downloaders (GHSA-h5h8-pc6h-jvvx / CVE-2021-29472)