cminpack: 1.3.4 -> 1.3.6

Semi-automatic update. These checks were done:

- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 1.3.6 in filename of file in /nix/store/ch2n83jgh0mv5h7992gm4lf9lmxp59lp-cminpack-1.3.6