mydumper: 0.9.3 -> 0.9.5

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

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

These checks were done:

- built on NixOS
- ran ‘/nix/store/agcvkgqnz979a024p7brjgrz8cgagsh0-mydumper-0.9.5/bin/mydumper --help’ got 0 exit code
- ran ‘/nix/store/agcvkgqnz979a024p7brjgrz8cgagsh0-mydumper-0.9.5/bin/myloader --help’ got 0 exit code
- found 0.9.5 with grep in /nix/store/agcvkgqnz979a024p7brjgrz8cgagsh0-mydumper-0.9.5
- directory tree listing: https://gist.github.com/593eb6f7d15a3b04c925f61d0dc068e7