zend-feed 2.9.1

Added

• Nothing.

Changed

• #16 updates the Zend\Feed\Pubsubhubbub\AbstractCallback to no longer use the
  $GLOBALS['HTTP_RAW_POST_DATA'] value as a fallback when php://input is
  empty. The fallback existed because, prior to PHP 5.6, php://input could
  only be read once. As we now require PHP 5.6, the fallback is unnecessary,
  and best removed as the globals value is deprecated.

Deprecated

• Nothing.

Removed

• Nothing.

Fixed

• #68 fixes the behavior of Zend\Feed\Writer\AbstractFeed::setTitle() and
  Zend\Feed\Writer\Entry::setTitle() to accept the string "0".

• #68 updates both Zend\Feed\Writer\AbstractFeed and Zend\Feed\Writer\Entry
  to no longer throw an exception for entry titles which have a string value of 0.