[gtk-doc] Prepare 1.31

[Michael Catanzaro <mcatanzaro src gnome org>]

commit c268fa535424d193953487c694e2a8f770d3255f
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Mon Aug 5 16:00:21 2019 -0500

    Prepare 1.31

 NEWS         | 4 ++--
 configure.ac | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/NEWS b/NEWS
index 1d3552f..83ef24c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,7 +1,7 @@
-GTK-Doc 1.30.1  ()
+GTK-Doc 1.31  (Aug 5 2019)
 ===============
 
-Development
+Nonmaintainer release to fix "Wrong permissions for style CSS file" (#84)
 
 GTK-Doc 1.30  (May 08 2019)
 ===============
diff --git a/configure.ac b/configure.ac
index 69c1597..a7953c7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_PREREQ([2.63])
 
 dnl We're using a two digit number for the releases and
 dnl a three digit number for the development version
-m4_define(gtk_doc_version, 1.30.1)
+m4_define(gtk_doc_version, 1.31)
 
 AC_INIT([gtk-doc],[gtk_doc_version],[https://gitlab.gnome.org/GNOME/gtk-doc/issues],[gtk-doc])