lsyncd: 2.1.6 -> 2.2.2

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/3f76mczmag2wnkww6la0hcdnf82jly92-lsyncd-2.2.2/bin/lsyncd --version` and found version 2.2.2
- found 2.2.2 with grep in /nix/store/3f76mczmag2wnkww6la0hcdnf82jly92-lsyncd-2.2.2
- found 2.2.2 in filename of file in /nix/store/3f76mczmag2wnkww6la0hcdnf82jly92-lsyncd-2.2.2

cc "@bobvanderlinden"