[dconf-editor] Bump required version of various libs.

[Arnaud Bonatti <arnaudb src gnome org>]

commit d361ea76f6db78f93bd261aa1ba87736a1a0f65c
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Tue Jan 9 10:09:20 2018 +0100

    Bump required version of various libs.

 editor/dconf-editor.vala |    5 +++++
 editor/meson.build       |    6 +++---
 meson.build              |    2 +-
 3 files changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/editor/dconf-editor.vala b/editor/dconf-editor.vala
index 25cfc4c..0aae02e 100644
--- a/editor/dconf-editor.vala
+++ b/editor/dconf-editor.vala
@@ -158,6 +158,11 @@ class ConfigurationEditor : Gtk.Application
     {
         Object (application_id: "ca.desrt.dconf-editor", flags: ApplicationFlags.HANDLES_COMMAND_LINE);
 
+//        TODO needs gio-2.0 >= 2.56
+//        set_option_context_parameter_string (_("..."));
+//        set_option_context_summary (_("..."));
+//        set_option_context_description (_("..."));
+
         add_main_option_entries (option_entries);
     }
 
diff --git a/editor/meson.build b/editor/meson.build
index d25ce9e..22e2db8 100644
--- a/editor/meson.build
+++ b/editor/meson.build
@@ -112,10 +112,10 @@ sources += gnome.compile_resources(
 )
 
 deps = [
-  dependency('dconf', version: '>= 0.25.1'),
-  dependency('glib-2.0', version: '>= 2.46.0'),
+  dependency('dconf', version: '>= 0.26.1'),
+  dependency('glib-2.0', version: '>= 2.55.1'),
   dependency('gmodule-2.0'),
-  dependency('gtk+-3.0', version: '>= 3.22.0'),
+  dependency('gtk+-3.0', version: '>= 3.22.27'),
   valac.find_library('config', dirs: meson.current_source_dir()),
   valac.find_library('posix')
 ]
diff --git a/meson.build b/meson.build
index 407a99f..1367ecc 100644
--- a/meson.build
+++ b/meson.build
@@ -26,7 +26,7 @@ dconf_editor_namespace = 'ca.desrt.dconf-editor'
 cc = meson.get_compiler('c')
 valac = meson.get_compiler('vala')
 
-vala_req_version = '>= 0.33.1'
+vala_req_version = '>= 0.39.4'
 
 assert(valac.version().version_compare(vala_req_version),
        'vala ' + vala_req_version + ' is required')