nanomsg: 1.1.3 -> 1.1.4 (#41984)

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/cgrs63zfbqf7p2kq1xsm2sl5wligj9gh-nanomsg-1.1.4/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 1.1.4 with grep in /nix/store/cgrs63zfbqf7p2kq1xsm2sl5wligj9gh-nanomsg-1.1.4
- directory tree listing: https://gist.github.com/ffcd786ca28d29d8689184633a4175e9
- du listing: https://gist.github.com/3dc4771cae8f61cdb26717382321406a