vim: 8.0.1451 -> 8.0.1605

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

- built on NixOS
- ran `/nix/store/5afa788kqasx65plvzwjnffq9ihzdbmn-vim-8.0.1605/bin/vim -h` got 0 exit code
- ran `/nix/store/5afa788kqasx65plvzwjnffq9ihzdbmn-vim-8.0.1605/bin/vim --help` got 0 exit code
- ran `/nix/store/5afa788kqasx65plvzwjnffq9ihzdbmn-vim-8.0.1605/bin/vim --version` and found version 8.0.1605
- found 8.0.1605 with grep in /nix/store/5afa788kqasx65plvzwjnffq9ihzdbmn-vim-8.0.1605
- directory tree listing: https://gist.github.com/f9af564ba8cc53b90d1d262c2e786eee