libtomcrypt: 1.18.1 -> 1.18.2 (#42993)

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/libtomcrypt/versions.

These checks were done:

- built on NixOS

- 0 of 0 passed binary check by having a zero exit code.
- 0 of 0 passed binary check by having the new version present in output.
- found 1.18.2 with grep in /nix/store/gxcivln6s36ljpx9hy1lq5hlpqfgsxnc-libtomcrypt-1.18.2
- directory tree listing: https://gist.github.com/790645636784c7dcaaf758a811a9cde4
- du listing: https://gist.github.com/b4577fa288333b9d817d01858d90947d