Add vdemeester to the maintainers list.
Add vdemeester to the maintainers list.

Because his doing an awesome job improving this package.

Signed-off-by: David Calavera <b9b0c8e7f90ecf337f6797c4d2e0f1dd0dbc0324@gmail.com>

mikedougherty/engine-api,vdemeester/engine-api,thaJeztah/engine-api,jwhonce/engine-api,docker/engine-api