- Update to 5.5
* The effect of the NO_INTERACTIVE_COMMENTS option extends into $(...)
and `...` command substitutions when used on the command line.
* Dropped patches, which are included upstream now:
- zsh-CVE-2018-1071.patch
- zsh-CVE-2018-1083.patch
* Fixes a buffer overflow in utils.c:checkmailpath() that can lead to
local arbitrary code execution (CVE-2018-1100 bnc#1089030)

- Added zsh-CVE-2018-1071.patch: Fixed a stack-based buffer overflow
in exec.c:hashcmd() (CVE-2018-1071 bnc#1084656)
- Added zsh-CVE-2018-1083.patch: Fixed a stack-based buffer overflow
in gen_matches_files() at compctl.c (CVE-2018-1083 bnc#1087026)
- Cleaned up spec file with spec-cleaner