Description of problem:
As a result of "spring cleanup", Ghostscript has new (sub)package layout, starting with Rawhide and Fedora 28.

One of the changes directly impacting you is that 'ghostscript-core' subpackage is now deprecated for use, and it will be removed at some point in the future.

It is required that you update your package's specfile accordingly, and fix additional issues with requirements that might occur...

Doing a rebuild (at least) in a mock is advised. Please, try doing this at your earliest convenience. Thank you! :)

The new package layout scheme for Ghostscript is this:

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* libgs - library providing Ghostscript's core functionality.
          Includes all necessary files for this library to function:
           - Ghostscript's library - /usr/share/lib64/libgs.so.* 
           - ICC profiles - /usr/share/ghostscript/iccprofiles/
           - library startup/configuration files - /usr/share/ghostscript/lib/
           - necessary resources - /usr/share/ghostscript/Resource/

* libgs-devel - Ghostscript's header files & unversioned symlink to library

* ghostscript - main package providing typical Ghostscript's functionality from
                command line
           - binaries: gs, gsnd, ghostscript
           - typical conversion scripts: eps2*, pdf2*, ps2*

* ghostscript-tools-dvipdf - contains 'dvipdf' script (this package pulls in
                             'texlive-dvips' as its dependency)

* ghostscript-tools-fonts - scripts related to work with AFM, PFB, PFA files
           - pf2afm
           - pfbtopfa
           - printafm

* ghostscript-tools-printing - scripts related to direct text printing on
                               several printers
           - gsbj, gsdj, gsdj500, gslj, gslp
           - pphs utility

* ghostscript-x11 - X11 driver which enables displaying of PS/PDF documents with
                    Ghostscript

* ghostscript-gtk - GTK-based binary for displaying of PS/PDF documents with
                    Ghostscript

* ghostscript-doc - documentation files

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Associated pull-request:
https://src.fedoraproject.org/rpms/cxsc/pull-request/1