Test failure on Core trunk because of download_package signature change #119
Description
Tests currently fail on Core trunk because the new changes that were made for signing update downloads changed the signature of the download_package method, cause a PHP notice to be generated:
PHP Strict Standards: Declaration of WP_CLI\Core\CoreUpgrader::download_package()
should be compatible with WP_Upgrader::download_package($package,
$check_signatures = false) in src/WP_CLI/Core/CoreUpgrader.php on line 162
Related wp-cli/wp-cli#5192