Bump versions for patch release v5.3.1

Increment API version to v5.3.1

Following the libtool guideline for updating
library version info, the ABI revision
number was incremented, resulting in the new
library version `9.1.0` (so.9.0.1)

For further details on libtool version-info
see: https://www.gnu.org/software/libtool/
manual/html_node/Updating-version-info.html

configure.ac

@@ -6,7 +6,7 @@
 # Use and distribution licensed under the BSD license.  See
 # the COPYING file in this directory for full text.
 
-AC_INIT([libdrizzle-redux],[5.2.0],[https://github.com/sociomantic-tsunami/libdrizzle-redux/issues],[libdrizzle-redux],[https://github.com/sociomantic-tsunami/libdrizzle-redux])
+AC_INIT([libdrizzle-redux],[5.3.1],[https://github.com/sociomantic-tsunami/libdrizzle-redux/issues],[libdrizzle-redux],[https://github.com/sociomantic-tsunami/libdrizzle-redux])
 
 AC_CONFIG_AUX_DIR([build-aux])
 
@@ -28,7 +28,7 @@ AC_CONFIG_HEADERS([config.h:config.in])dnl Keep filename to 8.3 for MS-DOS.
 AC_CONFIG_SRCDIR([libdrizzle/drizzle.cc])
 
 #shared library versioning
-LIBDRIZZLE_LIBRARY_VERSION=9:0:0
+LIBDRIZZLE_LIBRARY_VERSION=9:1:0
 #                         | | |
 #                  +------+ | +---+
 #                  |        |     |