`.htmlhintrc` silently ignored if not valid JSON

[eliasschoof]

If the .htmlhintrc is not valid JSON, the linter silently ignores it and uses a default config.

For example, I had made the mistake of keeping a trailing comma:

{
    "attr-lowercase": false,
}

The default config has "attr-lowerclase": true and I received a lot of unwanted errors. It took me a while to figure out that the malformatted JSON was the culprit.

It would be helpful if the linter at least displayed a warning log message upon execution if it cannot parse the config file.

[marwinburesch]

I agree, for example the docs use single quotes in the examples, but it is only valid with double quotes

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.