nanomsg: 1.1.2 -> 1.1.3

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

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

These checks were done:

- built on NixOS
- /nix/store/ixs53g4hgmjsapmv98rhp13dxnia80v7-nanomsg-1.1.3/bin/nanocat passed the binary check.
- 1 of 1 passed binary check by having a zero exit code.
- 0 of 1 passed binary check by having the new version present in output.
- found 1.1.3 with grep in /nix/store/ixs53g4hgmjsapmv98rhp13dxnia80v7-nanomsg-1.1.3
- directory tree listing: https://gist.github.com/cdb8b58cd0b2200dc629e5ed3c05af8b
- du listing: https://gist.github.com/76b99cc11ac487811d0eeff14406bfce