Handle cases when "undefined" is the error from wrapper.

[nsamarin]

Most likely cause:

        try:
            return json.loads(stdout)
        except json.decoder.JSONDecodeError as e:
            raise ScraperException(stdout) from None

caused by undefined to be returned from:

    api_script = (
        "var gplay = require('{}'){};"
        "gplay.{}({{{}}})"
        ".then(JSON.stringify).then(console.log).catch(console.log);"
    )