Change metadata to no longer require a branch or tag

snapcraft.yaml

@@ -60,11 +60,10 @@ parts:
 # epiphany needs access to /dev/shm/
   snapcraft-preload:
     source: https://github.com/sergiusens/snapcraft-preload.git
-    source-branch: 'master'
     source-depth: 1
 # ext:updatesnap
 #   version-format:
-#     allow-branch: true
+#     allow-neither-tag-nor-branch: true
     plugin: cmake
     cmake-parameters:
       - -DCMAKE_INSTALL_PREFIX=