Extract JSON-LD with control characters.

[shiquanwang]

Some pages have JSON-LD with control characters.
One example is: https://www.johnlewis.com/sony-xperia-x-smartphone-android-5-4g-lte-sim-free-32gb/p3210080

when you try to extract JSON-LD data from this page, you'll get:
Invalid control character at: line 8 column 353 (char 625)

Maybe need to change JsonLdExtractor._extract_items() in extruct/extruct/jsonld.py as below:

from json import JSONDecodeError

    def _extract_items(self, node):
        script = node.xpath('string()')
        try:
            data = json.loads(script)
        except ValueError:
            # sometimes JSON-decoding errors are due to leading HTML or JavaScript comments
            try:
                data = json.loads(HTML_OR_JS_COMMENTLINE.sub('', script))
            except JSONDecodeError:
                data = json.loads(script, strict=False)
        if isinstance(data, list):
            return data
        elif isinstance(data, dict):
            return [data]