Mark all N-APIs that have been added since version 5 as stable.

PR-URL: https://github.com/nodejs/node/pull/32058
Fixes: https://github.com/nodejs/abi-stable-node/issues/393
Co-Authored-By: legendecas <legendecas@gmail.com>
Signed-off-by: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

Add test coverage for passing `NULL` to each parameter of
`napi.*(propert|element)` and `napi_set_prototype`. In the case of
`napi_define_properties` also test setting various initializer fields
to `NULL`.

PR-URL: https://github.com/nodejs/node/pull/31488
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>