End all private headers by -private.h
This also adds an API visibility linter script to check that we don't accidentally export headers tagged as private.
Fixes https://gitlab.gnome.org/aplazas/libmanette/issues/16.
CC @exalm
This also adds an API visibility linter script to check that we don't accidentally export headers tagged as private.
Fixes https://gitlab.gnome.org/aplazas/libmanette/issues/16.
CC @exalm