Fix SPM test target
Fix SPM test target

Thanks to @aciidb0mb3r: https://bugs.swift.org/browse/SR-5697?focusedCommentId=27793&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-27793

groue/GRDB.swift,groue/GRDB.swift,groue/GRDB.swift,groue/GRDB.swift