[gxml/gxml-0.18] Set version to 0.18.1

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit c49f2d0845154fdc6336326ee01756212b907e6d
Author: Daniel Espinosa <esodan gmail com>
Date:   Sun Jul 7 09:38:53 2019 -0500

    Set version to 0.18.1
    
    Adding meson_options.txt missing file.

 Makefile.am  | 1 +
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/Makefile.am b/Makefile.am
index a747aa7..e0a38a2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -36,6 +36,7 @@ EXTRA_DIST = $(gxmldoc_DATA) \
        vapi \
        config.rpath \
        meson.build \
+       meson_options.txt \
        gxml/meson.build \
        po/meson.build \
        docs/meson.build \
diff --git a/configure.ac b/configure.ac
index c7be6dc..6c3dfbf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,7 +12,7 @@
 # Release Version for API related changes
 m4_define([project_major_version], [0])
 m4_define([project_minor_version], [18])
-m4_define([project_micro_version], [0])
+m4_define([project_micro_version], [1])
 m4_define([project_nano_version], [0])
 
 # LT_VERSION for ABI related changes