For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ChristianMauderer:opensuse-installations:jameica/openSUSE_Tumbleweed/home:ChristianMauderer:opensuse-installations:jameica.repo
zypper refresh
zypper install hibiscus
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ChristianMauderer:opensuse-installations:jameica/15.5/home:ChristianMauderer:opensuse-installations:jameica.repo
zypper refresh
zypper install hibiscus
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:ChristianMauderer:opensuse-installations:jameica/15.4/home:ChristianMauderer:opensuse-installations:jameica.repo
zypper refresh
zypper install hibiscus