Changes in 1.5.4

• background: Add a signal to the impl api
• background: Rewrite the monitoring to better track when apps disappear
• permissions: Fix SetValue handling of GVariant wrapping. This is an api change
• openuri: Add a per-type always-ask option
• openuri: Show the app chooser dialog less often
• memorymonitor: A new portal to let apps receive low memory warnings
• filetransfer: A new portal to rewrite file paths between sandboxes

$ sha256sum xdg-desktop-portal-1.5.4.tar.xz 
bf8352586b71daa02469f9e87da4433cba60a534273e0b5328d6618eaa0eba5c  xdg-desktop-portal-1.5.4.tar.xz