test: add coverage for napi_typeof

We had some, but not complete coverage indirectly through
other tests.  Add test to validate it specifically and
covers cases that were not being covered.

Backport-PR-URL: https://github.com/nodejs/node/pull/19447
PR-URL: https://github.com/nodejs/node/pull/13990


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>