Merge pull request #713 from wp-cli/fix/missing-manifest #430

Job	Run time
Build Phar	41s
Functional - WP latest on PHP 7.2 with MySQL 8.0	4m 24s
Functional - WP latest on PHP 7.3 with MySQL 8.0	4m 9s
Functional - WP latest on PHP 7.4 with MySQL 8.0	3m 56s
Functional - WP latest on PHP 8.0 with MySQL 8.0	4m 8s
Functional - WP trunk on PHP 7.2 with MySQL 8.0	3m 56s
Functional - WP trunk on PHP 7.2 with MySQL 5.7	4m 23s
Functional - WP trunk on PHP 7.2 with MySQL 5.6	4m 11s
Functional - WP trunk on PHP 7.4 with MySQL 8.0	3m 56s
Functional - WP trunk on PHP 8.0 with MySQL 8.0	4m 2s
Functional - WP trunk on PHP 8.0 with MySQL 5.7	4m 10s
Functional - WP trunk on PHP 8.0 with MySQL 5.6	4m 12s
Functional - WP 3.7 on PHP 5.6 with MySQL 5.6	4m 21s
Deployment	30s
Build RPM package	0s
Build DEB package	0s
	50m 59s

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