Compton: Sample configuration file has deprecated settings

[Selhar]

More specifically:

[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] Option `no-dock-shadow` is deprecated, and will be removed. Please use the wintype option `shadow` of `dock` instead.
[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] Option `no-dnd-shadow` is deprecated, and will be removed. Please use the wintype option `shadow` of `dnd` instead.
[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] Option `menu-opacity` is deprecated, and will be removed.Please use the wintype option `opacity` of `popup_menu` and `dropdown_menu` instead.
[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] "clear-shadow" is removed as an option, and is always enabled now. Consider removing it from your config file
[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] "paint-on-overlay" has been removed as an option, and is enabled whenever possible
[ 02/28/2019 13:28:38.945 parse_config_libconfig WARN ] "alpha-step" has been removed, compton now tries to make use of all alpha values

[yshui]

@Selhar You are using yshui/compton, not this repo.

[lamduong33]

@Selhar You are using yshui/compton, not this repo.

This repo has deprecated settings as well.