• migrate22.php is now called migrate30.php.
• Using php-cs-fixer for automated coding standards enforcement and fixing.
• #660: principals could break html output.
• #662: Fixed several bugs in the share request parser.
• #665: Fix a bug in serialization of complex properties in the proppatch
  request in the client.
• #666: expand-property report did not correctly prepend the base uri when
  generating uris, this caused delegation to break.
• #659: Don't throw errors when when etag-related checks are done on
  collections.
• Fully supporting the updated Prefer header syntax, as defined in
  rfc7240.
• The zip release ships with sabre/vobject 3.4.3,
  sabre/http 4.0.0, sabre/event 2.0.2,
  sabre/uri 1.0.1 and sabre/xml 1.0.0.