feat: return empty object if string is empty

[tobiasdiez]

Without the special handling it doesn't pass this check

if (!JsonSigRx.test(val)) {
    return val
}

and thus returns an empty string again.

[pi0]

Should be handled with #11 on strict mode

[tobiasdiez]

I don't quite understand. Isn't the mapping of an empty string to an empty object what you would expect. This should also be independent of the strict mode, since the empty string is a valid json string and strict mode should only concern what happens if the string is not valid json. In fact, without this PR an empty string would throw an exception in the strict mode, which is not what you want either.

[pi0]

Node.js behavior with JSON.parse(''): (same as strict mode)

> JSON.parse('')
Uncaught SyntaxError: Unexpected end of JSON input

Without strict mode, destr, returns values as-is if they are not detected as JSON. And returning empty string as is, also makes sense i think with this considration.

[tobiasdiez]

Okay, thanks for the clarification!