xpraGtk3: 2.1.3 -> 2.2.5

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

- built on NixOS
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/xpra -h` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/xpra --help` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/xpra --version` and found version 2.2.5
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/udev_product_version -h` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/udev_product_version --help` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/udev_product_version help` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/..xpra-wrapped-wrapped -h` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/..xpra-wrapped-wrapped --help` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/..xpra-wrapped-wrapped --version` and found version 2.2.5
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/.xpra-wrapped -h` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/.xpra-wrapped --help` got 0 exit code
- ran `/nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5/bin/.xpra-wrapped --version` and found version 2.2.5
- found 2.2.5 with grep in /nix/store/raq8vylxav1gm8v4gsphfmpbq6mw9362-xpra-2.2.5
- directory tree listing: https://gist.github.com/78f0907352399b3a9966fb6f71f1f0d4