jgmenu: 0.9 -> 1.0

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

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

These checks were done:

- built on NixOS
- Warning: no invocation of /nix/store/vpa11fifwvfrf98sl02ypf1cydnwffm9-jgmenu-1.0/bin/jgmenu had a zero exit code or showed the expected version
- /nix/store/vpa11fifwvfrf98sl02ypf1cydnwffm9-jgmenu-1.0/bin/jgmenu_run passed the binary check.
- 1 of 2 passed binary check by having a zero exit code.
- 0 of 2 passed binary check by having the new version present in output.
- found 1.0 with grep in /nix/store/vpa11fifwvfrf98sl02ypf1cydnwffm9-jgmenu-1.0
- directory tree listing: https://gist.github.com/7f8cc3d354c6e8dec4eb42d5ac45a921
- du listing: https://gist.github.com/1a4c5fbad4edaf52118c0d319a135cc7