update release verion to 1.13.0.rc1

configure.ac

@@ -15,7 +15,7 @@ dnl AC_REVISION([$Revision$])dnl
 dnl autoconf v2.70 and later is required. See https://github.com/Parallel-NetCDF/PnetCDF/issues/94
 dnl autoconf v2.70 was released in 2021-01-28
 AC_PREREQ([2.70])
-AC_INIT([PnetCDF],[1.12.3],[[email protected]],[pnetcdf],[https://parallel-netcdf.github.io])
+AC_INIT([PnetCDF],[1.13.0.rc1],[[email protected]],[pnetcdf],[https://parallel-netcdf.github.io])
 
 dnl config.h.in will be created by autoreconf (autoheader)
 dnl call it right after AC_INIT, as suggested by autoconf
@@ -2602,7 +2602,7 @@ dnl Update the version information only immediately before a public release.
 dnl PnetCDF starts with 1:0:0 (shared library is first supported in 1.9.0)
 dnl because some package distributors, such as Debian, may have already built
 dnl PnetCDF with shared libraries.
-ABIVERSION="4:3:0"
+ABIVERSION="5:0:0"
 AC_SUBST(ABIVERSION)
 if test "$enable_versioning" = "yes" ; then
    ABIVERSIONFLAGS="-version-info \$(ABIVERSION)"