CentOS 8 - ImageMagick 7

Installation:

1. install epel repo
2. install remi repo
3. install rpmfusion free repo
4. install ImageMagick 7

# dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm
# dnf install https://rpms.remirepo.net/enterprise/remi-release-8.rpm
# dnf search ImageMagick
# dnf install --nogpgcheck https://mirrors.rpmfusion.org/free/el/rpmfusion-free-release-$(rpm -E %rhel).noarch.rpm
# dnf repolist
# dnf --enablerepo=remi --enablerepo=rpmfusion-free-updates install ImageMagick7 ImageMagick7-heic