Does not report trailing commas as JSON errors

[shdwcat]

For example, this chunk of JSON is not valid:

	"patterns": [
		{
			"include": "#keywords"
		},
		{
			"include": "#strings"
		}, <-- this comma is an error in standard JSON
	],

It's very easy to miss these and VS Code will not load the language file if errors like this are present.

[pedro-w]

Apologies for the delay, I will look into it.

[pedro-w]

Actually I don't know how to do this. I put a bounty on an unanswered question on StackOverflow - it didn't help much but it looks like maybe I have to add a JSON parser as a dependency and make use of that. Which seems weird that I can't make use of the JSON support that VSCode already has built-in. In other words I just want the tmlanguage to be an add-in to JSON editing, not replace it entirely.