[node] Added Nan::AsyncResource in NodeMap::renderFinished

[brunoabinader]

Nan recently deprecated Callback::Call without a given asynchronous resource. All our node CI jobs are now failing with the given output:

.../node_map.cpp:484:13: error: 'Call' is deprecated [-Werror,-Wdeprecated-declarations]
        cb->Call(1, argv);
            ^

Fixes #11288.

[jfirebaugh]

Not sure this is the correct fix. Did you read https://github.com/nodejs/nan/blob/master/doc/node_misc.md and https://nodejs.org/dist/latest-v9.x/docs/api/async_hooks.html?

[ChrisLoer]

Alternative (temporary but also hopefully more conservative) fix at: #11321

[brunoabinader]

@jfirebaugh intent was to replicate AsyncWorker's internal usage of AsyncResource without the extra encapsulation. What it seems I have missed on the initial patch was passing the map object's handle() as a param to the AsyncResource ctor.

However, we probably want to stay in the safe lane and subclass AsyncWorker to handle it instead.

[kkaefer]

Superseded by #11913