Merge pull request #35 from Kekun/flatpak

flatpak: Allow saving in home and SDK bump

flatpak/com.github.Alcaro.Flips.json

@@ -1,7 +1,7 @@
 {
     "app-id" : "com.github.Alcaro.Flips",
     "runtime" : "org.gnome.Platform",
-    "runtime-version" : "3.34",
+    "runtime-version" : "3.38",
     "sdk" : "org.gnome.Sdk",
     "command" : "flips",
     "finish-args" : [
@@ -12,6 +12,8 @@
         "--socket=wayland",
         /* OpenGL + DRI access */
         "--device=dri",
+        /* Needed to save patched ROMs */
+        "--filesystem=home",
         /* Needed to find the ROMs and patches */
         "--filesystem=host:ro"
     ],