release: prepare for 3.33.90

NEWS

+3.3.90
+======
+
+- Add a command line launcher (#758253)
+- Fix viewer mimetype matching (#20, Joel Ong)
+- Load viewers from home directory (#19, Joel Ong)
+- Translation updates
+
 3.33.4
 ======
 

flatpak/org.gnome.NautilusPreviewer.json

 {
     "app-id": "org.gnome.NautilusPreviewer",
     "runtime": "org.gnome.Platform",
-    "runtime-version": "3.32",
+    "runtime-version": "master",
     "sdk": "org.gnome.Sdk",
     "build-options": {
         "cflags": "-O2 -g",

meson.build

 project(
   'sushi',
   'c',
-  version: '3.33.4',
+  version: '3.33.90',
   meson_version: '>=0.46.0'
 )