Maintenance and security release of the Drupal 8 series.
This release fixes security vulnerabilities. Sites are urged to upgrade immediately after reading the notes below and the security announcement:
No other fixes are included.
Beginning with this release, packaged Drupal releases no longer contain development PHP libraries. See Drupal 8 will no longer include dev dependencies in release packages for more information.
No changes have been made to the .htaccess, web.config, robots.txt or default settings.php files in this release, so upgrading custom versions of those files is not necessary.
See the list of the known issues for the 8.2.x branch. There are no known regressions in this release.