tools: fix type sniffing for properties in JSON generation

[TimothyGu]

Before:

            {
              "textRaw": "`children` {Array} ",
              "name": "children",
              "desc": "<p>The module objects required by this one.\n\n</p>\n"
            },

(https://nodejs.org/api/modules.json)

After:

            {
              "textRaw": "`children` {Array} ",
              "type": "Array",
              "name": "children",
              "desc": "<p>The module objects required by this one.\n\n</p>\n"
            },

[mscdex]

LGTM with a couple of nits: the commit should target tools: instead of doc: and the first line of the commit message needs to be 50 characters or less.

[TimothyGu]

@mscdex, done.

[jasnell]

LGTM

[TimothyGu]

Ping.

[Trott]

I don't think running CI does anything with tools/doc/json.js but just in case...

CI: https://ci.nodejs.org/job/node-test-pull-request/1442/

[Trott]

Not sure what's up with the ARM hosts in CI right now (stuck in pending, won't start a CI run) but everything else is green.

This probably isn't even anything anyone will ever run on ARM anyway since it's internal tooling.

And CI doesn't even exercise this code, so the CI run is kind of a symbolic gesture more than anything else.

So, will land in another minute or two...

[Trott]

Landed in 5d8c192b42bd4f9bbdc20fd22bb797663901718c

[Trott]

Landed in ab45390