astro/gnuastro: Update to 0.18

Index: Makefile
===================================================================
RCS file: /cvs/ports/astro/gnuastro/Makefile,v
retrieving revision 1.8
diff -u -p -r1.8 Makefile
--- Makefile 15 Jul 2022 08:48:42 -0000 1.8
+++ Makefile 13 Aug 2022 09:37:26 -0000
@@ -1,10 +1,9 @@
COMMENT = GNU Astronomy Utilities
-DISTNAME = gnuastro-0.17
+DISTNAME = gnuastro-0.18
CATEGORIES = astro
-PKGNAME = gnuastro-0.17
-REVISION = 0
+PKGNAME = gnuastro-0.18

-SHARED_LIBS += gnuastro 3.0 # 15.0
+SHARED_LIBS += gnuastro 3.1 # 16.0

HOMEPAGE = https://www.gnu.org/software/gnuastro/
MAINTAINER = Brian Callahan <bcallah@openbsd.org>
Index: distinfo
===================================================================
RCS file: /cvs/ports/astro/gnuastro/distinfo,v
retrieving revision 1.6
diff -u -p -r1.6 distinfo
--- distinfo 4 Jun 2022 11:01:43 -0000 1.6
+++ distinfo 13 Aug 2022 09:37:26 -0000
@@ -1,2 +1,2 @@
-SHA256 (gnuastro-0.17.tar.gz) = xBvtM8wkDOqXg/Q2dNfPR0R0ZgRm4QiPJZoLDKivaPU=
-SIZE (gnuastro-0.17.tar.gz) = 6283550
+SHA256 (gnuastro-0.18.tar.gz) = bKfiLhQFERdMbwL9+UitCL8/dB/k6YKNjBzfKnCtWec=
+SIZE (gnuastro-0.18.tar.gz) = 6754502
Hi,

Here is a patch for astro/gnuastro to update to 0.18.
It build and run well on amd64-current system.
There are 9 tests fail in total 75 tests, while there are
5 tests fail in 0.17 version.

Cheers !
wen