[gtkmm-documentation] Use glibmm-2.64 instead of glibmm-2.62

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 76fcff27aa94bc1197cb415566fa920e73b425e4
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Thu Sep 19 18:21:58 2019 +0200

    Use glibmm-2.64 instead of glibmm-2.62
    
    We have changed the ABI name in glibmm.

 configure.ac | 2 +-
 meson.build  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 23e4947..983c876 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ MM_AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
 AC_PATH_PROG([PERL], [perl], [perl])
 AC_PROG_SED
 
-PKG_CHECK_MODULES([GIOMM], [giomm-2.62 >= 2.61.1])
+PKG_CHECK_MODULES([GIOMM], [giomm-2.64 >= 2.63.1])
 PKG_CHECK_MODULES([GTKMM], [gtkmm-4.0  >= 3.95.1])
 MM_PKG_CONFIG_SUBST([GTHREAD_CFLAGS], [--cflags-only-other gthread-2.0])
 
diff --git a/meson.build b/meson.build
index c5c73fa..5da90ff 100644
--- a/meson.build
+++ b/meson.build
@@ -11,7 +11,7 @@ project('gtkmm-documentation', 'c', 'cpp',
 
 gtkmm_pcname = 'gtkmm-4.0'
 gtkmm_dep = dependency(gtkmm_pcname, version: '>=3.95.1')
-giomm_dep = dependency('giomm-2.62', version: '>=2.61.1')
+giomm_dep = dependency('giomm-2.64', version: '>=2.63.1')
 gnome = import('gnome')
 
 # Installation directories are relative to {prefix}.