Enabled debug testing for addons

[mhdawson]

We should look at enabled testing of addons under debug in core.

[gabrielschulhof]

@mhdawson can we add a field to our top-level CI job that would cause it to append --debug to the npm test command line that runs our tests?

[mhdawson]

@gabrielschulhof do you mean an option when you run the job which can add the --debug or not? That might work, although I think in many cases we'd want Node.js to be compiled in debug which will be a challenge since right now we use the existing nightly builds instead of building Node.js

[mhdawson]

I think there is also this issue for adding debug testing in core. nodejs/build#1854

[mhdawson]

Next steps

• Enable addon testing in existing debug CI runs - Addon tests aren’t run in debug-mode CI build#1854
• Create debug test for node-addon-api in node-addon-testing for single platform (linux) and master of Node.js.
• Consider if we should run on all LTS versions