[gnome-tweaks] README: bump recommended versions to stable releases

[Jeremy Bicha <jbicha src gnome org>]

commit ec159e55e47f5585694c75e313e1e514f32ae13a
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Mon Aug 27 05:29:37 2018 -0400

    README: bump recommended versions to stable releases
    
    It is a bit easier to read and we don't really recommend
    development releases of libraries anyway.

 README.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/README.md b/README.md
index 03c6fed..e3cd020 100644
--- a/README.md
+++ b/README.md
@@ -17,15 +17,15 @@ RUNTIME DEPENDENCIES
 * gnome-settings-daemon
 
 * GIR files and libraries from:
-  - GLib (>= 2.57.2)
+  - GLib (>= 2.58)
   - GTK+ 3 (>= 3.12)
-  - gnome-desktop (>= 3.29.90.1)
+  - gnome-desktop (>= 3.30)
   - libsoup
   - libnotify
   - Pango
 
 * GSettings Schemas from:
-  - gsettings-desktop-schemas (>= 3.27.90)
+  - gsettings-desktop-schemas (>= 3.28)
   - gnome-shell (>= 3.24)
   - mutter