This patch provides support for reading elements defined in the GooglePlay Podcasts 1.0 DTD. Specifically, it defines the following twoclasses with the noted methods:```phpnamespace Zend\Feed\Reader\Extension\GooglePlayPodcast;class Entry{    /**     * Get googleplay:block value     */    public function getPlayPodcastBlock() : string;    /**     * Get googleplay:explicit value     */    public function getPlayPodcastExplicit() : ?string;    /**     * Get the googleplay:description value     */    public function getPlayPodcastDescription() : string;}class Feed{    /**     * Get the googleplay:author value     */    public function getPlayPodcastAuthor() : string;    /**     * Get the googleplay:block value     */    public function getPlayPodcastBlock() : string;    /**     * Get the googleplay:category values     */    public function getPlayPodcastCategories() : ?array    /**     * Get the googleplay:explicit value     */    public function getPlayPodcastExplicit() : ?string    /**     * Get the googleplay:image@href value     */    public function getPlayPodcastImage() : string    /**     * Get the googleplay:description value     */    public function getPlayPodcastDescription() : string;}```The extension is now registered by default both with extension managersand `Reader`.

Adds the Writer extension `GooglePlayPodcast`, defining the followingtwo classes:```phpnamespace Zend\Feed\Writer\Extension\GooglePlayPodcast;class Entry{    /**     * Sets the googleplay:block value     */    public function setPlayPodcastBlock(string $value) : self;    /**     * Sets the googleplay:explicit value     */    public function setPlayPodcastExplicit(string $value) : self;    /**     * Sets the googleplay:description value     */    public function setPlayPodcastDescription(string $value) : self;}class Feed{    /**     * Sets the googleplay:block value     */    public function setPlayPodcastBlock(string $value) : self;    /**     * Add feed authors (googleplay:author)     */    public function addPlayPodcastAuthors(array $values) : self;    /**     * Add a feed author (googleplay:author)     */    public function addPlayPodcastAuthor(string $value) : self;    /**     * Set feed categories (googleplay:category)     */    public function setPlayPodcastCategories(array $values) : self;    /**     * Set googleplay:image value     */    public function setPlayPodcastImage(string $value) : self;    /**     * Set googleplay:explicit value     */    public function setPlayPodcastExplicit(string $value) : self;    /**     * Set googleplay:description value     */    public function setPlayPodcastDescription(string $value) : self;}```The `Zend\Feed\Writer\Extension\GooglePlayPodcast\Renderer` classes havebeen updated to emit these values as well.