Support trailing comma

[martolini]

Is your feature request related to a problem? Please describe.
When I'm working in python and typescript, a common code convention when writing "json-like" objects is to have trailing commas, i.e;

service = {
    "apiVersion": "v1",
    "kind": "Service",
    "metadata": {"name": "service"},
    "spec": {
        "ports": [{"port": 80, "targetPort": 8000}],
    },
}

This is typically preferred in loads of prettier/black setups.

Describe the solution you'd like
It would be excellent if this plugin also handled that input instead of "an error occurred converting content from json".

[qyurila]

JSON5 accpts trailing comma (as well as comments etc.)

Because It's one of the promissing data interchange formats and very similar to JSON, I think it's an option worth to considering to implement, but only if the owner is positively considering to introduce 'JSON with Comments' format support. (#18)

[hilleer]

@qyurila in general I would highly consider anything the community requests 🙂 Will have a look at it. Otherwise pull requests are welcome as well.