[Data Liberation] Add EPub to Blocks converter (#2097)

Author: adamziel

packages/playground/data-liberation/bootstrap.php

@@ -61,6 +61,7 @@
 
 require_once __DIR__ . '/src/entity-readers/WP_Entity_Reader.php';
 require_once __DIR__ . '/src/entity-readers/WP_HTML_Entity_Reader.php';
+require_once __DIR__ . '/src/entity-readers/WP_EPub_Entity_Reader.php';
 require_once __DIR__ . '/src/entity-readers/WP_WXR_Entity_Reader.php';
 require_once __DIR__ . '/src/entity-readers/WP_Directory_Tree_Entity_Reader.php';