@the-kenny did a good job in the past and is set as maintainer in many package,
however since 2017-2018 he stopped contributing. To create less confusion
in pull requests when people try to request his feedback, I removed him as
maintainer from all packages.
Also updates the matchable egg (used by egg2nix) from 1.0 -> 1.1 and
removes trailing slashes from the path prefix variables passed to
wrapProgram (they're unnecessary and only result in doubled-up slashes
in the values).
