Merge pull request #764 from wp-cli/add/autoload-suffix #479

Job	Run time
Build Phar	42s
Functional - WP latest on PHP 7.4 with MySQL 8.0	5m 39s
Functional - WP trunk on PHP 7.2 with MySQL 8.0	5m 44s
Functional - WP latest on PHP 8.0 with MySQL 8.0	5m 32s
Functional - WP latest on PHP 7.2 with MySQL 8.0	5m 47s
Functional - WP trunk on PHP 7.4 with MySQL 8.0	6m 16s
Functional - WP latest on PHP 7.3 with MySQL 8.0	6m 29s
Functional - WP trunk on PHP 7.2 with MySQL 5.6	5m 51s
Functional - WP trunk on PHP 7.2 with MySQL 5.7	5m 57s
Functional - WP trunk on PHP 8.0 with MySQL 8.0	5m 48s
Functional - WP trunk on PHP 8.0 with MySQL 5.7	5m 45s
Functional - WP trunk on PHP 8.0 with MySQL 5.6	5m 43s
Functional - WP 4.9 on PHP 7.2 with MySQL 5.6	5m 41s
Deployment	17s
Build RPM package	-1s
Build DEB package	0s
	1h 11m 10s

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