xpra: 2.1.3 -> 2.2.4

Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:

- built on NixOS
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra --version` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra -h` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra --help` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/udev_product_version -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/udev_product_version --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/udev_product_version help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra_launcher-wrapped -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra_launcher-wrapped --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra_launcher-wrapped --version` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra_launcher-wrapped -h` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra_launcher-wrapped --help` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra_launcher -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra_launcher --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra_launcher --version` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra_launcher -h` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/xpra_launcher --help` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/..xpra-wrapped-wrapped -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/..xpra-wrapped-wrapped --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/..xpra-wrapped-wrapped --version` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/..xpra-wrapped-wrapped -h` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/..xpra-wrapped-wrapped --help` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra-wrapped -h` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra-wrapped --help` got 0 exit code
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra-wrapped --version` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra-wrapped -h` and found version 2.2.4
- ran `/nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4/bin/.xpra-wrapped --help` and found version 2.2.4
- found 2.2.4 with grep in /nix/store/sdb561gabzb04az1f9wq6190prqzv618-xpra-2.2.4