[seahorse] meson: bump minimum libhandy to 1.6.0

[Niels De Graef <nielsdg src gnome org>]

commit 2af4d0a56cb5582424c8553944c77c09feeadac7
Author: Jeremy Bicha <jeremy bicha canonical com>
Date:   Tue May 24 10:51:58 2022 -0400

    meson: bump minimum libhandy to 1.6.0

 meson.build | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
---
diff --git a/meson.build b/meson.build
index 949f8726..5a79bcb8 100644
--- a/meson.build
+++ b/meson.build
@@ -37,8 +37,7 @@ glib_deps = [
   dependency('gmodule-2.0', version: '>=' + min_glib_version),
 ]
 gtk = dependency('gtk+-3.0', version: '>= 3.24.0')
-# FIXME bump to 1.6.0 after libhandy 1.6 is released.
-libhandy_dep = dependency('libhandy-1', version: '>= 1.5.0')
+libhandy_dep = dependency('libhandy-1', version: '>= 1.6.0')
 gcr = dependency('gcr-3',       version: '>=' + min_gcr_version)
 gcr_ui = dependency('gcr-ui-3', version: '>=' + min_gcr_version)
 libsecret = dependency('libsecret-1', version: '>= 0.16')
@@ -87,8 +86,6 @@ avahi_glib = dependency('avahi-glib', version: '>= 0.6', required: get_option('k
 # Project-wide flags
 add_project_arguments([
     '--target-glib=@0@'.format(min_glib_version),
-    # FIXME Remove and bump version after libhandy 1.6 is released.
-    '--disable-since-check',
   ],
   language: 'vala',
 )