2.1.10

• #784: Sync logs for address books were not correctly cleaned up after
  deleting them.
• The zip release ships with sabre/vobject 3.5.0,
  sabre/http 3.0.5, and sabre/event 2.0.2.

3.1.1

• #755: The brower plugin and some operations would break when scheduling and
  delegation would both be enabled.
• #757: A bunch of unittest improvements (@jakobsack).
• The zip release ships with sabre/vobject 4.0.1,
  sabre/http 4.2.1, sabre/event 3.0.0,
  sabre/uri 1.0.1 and sabre/xml 1.3.0.

2.1.9

• #674: PHP7 support (@DeepDiver1975).
• The zip release ships with sabre/vobject 3.5.0,
  sabre/http 3.0.5, and sabre/event 2.0.2.

3.0.7

• #752: PHP 7 support for 3.0 branch. (@DeepDiver1975)
• The zip release ships with sabre/vobject 3.5.0,
  sabre/http 4.2.1, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.3.0.

3.1.0

• Better error message when the browser plugin is not enabled.
• Added a super minimal server example.
• #730: Switched all mysql tables to utf8mb4 character set, allowing you to
  use emoji in some tables where you couldn't before.
• #710: Provide an Auth backend that acts as a helper for people implementing
  OAuth2 helper token. (@fkooman).
• #729: Not all calls to Sabre\DAV\Tree::getChildren() were properly cached.
• #727: Added another workaround to make CalDAV work for Windows 10 clients.
• #742: Fixes to make sure that vobject 4 is correctly supported.
• #726: Better error reporting in Client::propPatch. We're now throwing
  exceptions.
• #608: When a HTTP error is triggered during Client:propFind, we're now
  throwing Sabre\HTTP\ClientHttpException instead of Sabre\DAV\Exception.
  This new exception contains a LOT more information about the problem.
• #721: Events are now handled in the correct order for COPY requests.
  Before this subtle bugs could appear that could cause data-loss.
• #747: Now throwing exceptions and setting the HTTP status to 500 in subtle
  cases where no other plugin set a correct HTTP status.
• #686: Corrected PDO principal backend's findByURI for email addresses that
  don't match the exact capitalization.
• #512: The client now has it's own User-Agent.
• #720: Some browser improvements.
• The zip release ships with sabre/vobject 4.0.1,
  sabre/http 4.2.1, sabre/event 3.0.0,
  sabre/uri 1.0.1 and sabre/xml 1.3.0.

3.0.6

• #730: Switched all mysql tables to utf8mb4 character set, allowing you to
  use emoji in some tables where you couldn't before.
• #729: Not all calls to Sabre\DAV\Tree::getChildren() were properly cached.
• #734: Return 418 I'm a Teapot when generating a multistatus response that
  has resources with no returned properties.
• #740: Bugs in migrate20.php script.
• The zip release ships with sabre/vobject 3.4.8,
  sabre/http 4.1.0, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.3.0.

2.1.8

• #729: Fixed a caching problem in the Tree object.
• #740: Bugs in migrate20.php script.
• The zip release ships with sabre/vobject 3.4.8,
  sabre/http 3.0.5, and sabre/event 2.0.2.

3.0.5

• #704: Fixed broken uri encoding in multistatus responses. This affected
  at least CyberDuck, but probably also others.
• The zip release ships with sabre/vobject 3.4.7,
  sabre/http 4.1.0, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.2.0.

3.1.0-alpha2

• Massive calendars and addressbooks should see a big drop in peak memory
  usage.
• Fixed a privilege bug in the availability system.
• #697: Added a "tableName" member to the PropertyStorage PDO backend. (@Frzk).
• #699: PostgreSQL fix for the Locks PDO backend. (@TCKnet)
• Removed the simplefsserver.php example file. It's not simple enough.
• #703: PropPatch in client is not correctly encoded.
• #709: Throw exception when running into empty
  supported-calendar-component-set.
• #711: Don't trigger deserializers for empty elements in {DAV:}prop. This
  fixes issues when using sabre/dav as a client.
• The zip release ships with sabre/vobject 4.0.0-alpha2,
  sabre/http 4.1.0, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.2.0.

3.0.4

• #703: PropPatch in client is not correctly encoded.
• #709: Throw exception when running into empty
  supported-calendar-component-set.
• #711: Don't trigger deserializers for empty elements in {DAV:}prop. This
  fixes issues when using sabre/dav as a client.
• #705: A MOVE request that gets prevented from deleting the source resource
  will still remove the target resource. Now all events are triggered before
  any destructive operations.
• The zip release ships with sabre/vobject 3.4.7,
  sabre/http 4.1.0, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.2.0.