add requires to fix build failures from missing devel OBS-URL: https://build.opensuse.org/request/show/741945 OBS-URL: https://build.opensuse.org/package/show/server:database:postgresql/postgresql12?expand=0&rev=2
initial package OBS-URL: https://build.opensuse.org/request/show/741872 OBS-URL: https://build.opensuse.org/package/show/server:database:postgresql/postgresql12?expand=0&rev=1