d/gbp.conf: automatically bump project version
this makes sure we don't forget to bump the version in meson.build
thanks to @guido.gunther for suggesting this in https://source.puri.sm/Librem5/calls/-/merge_requests/258#note_143733 !
this makes sure we don't forget to bump the version in meson.build
thanks to @guido.gunther for suggesting this in https://source.puri.sm/Librem5/calls/-/merge_requests/258#note_143733 !