Tests in PHP 7.3 fail because of a misuse of compact() #113
Description
Tests are failing on PHP 7.3 because of https://www.php.net/manual/en/function.compact.php#refsect1-function.compact-changelog:
and https://github.com/WordPress/WordPress/blob/4.3.15/wp-includes/post.php#L3372 (couldn't find version 4.3.2 as used in the tests on GitHub:
$post_parent = apply_filters(
'wp_insert_post_parent',
$post_parent,
$post_ID,
compact( array_keys( $postarr ) ),
$postarr
);Originally posted by @localheinz in #111 (comment)
Related wp-cli/wp-cli#5192