References broken between separate script tags

[Sarke]

I ran into this problem with the New York Times. They have the NewsArticle and the NewsMediaOrganization in separate tags, and because of the way Jkphl\Micrometa\Infrastructure\Parser\JsonLD parses them separately with ML\JsonLD\JsonLD, the latter is not able to resolve the references across tags, (for example in this case the publication).

My solution was to rewrite Jkphl\Micrometa\Infrastructure\Parser\JsonLD::parseDom() to collect the schema in one root node, and send that off to ML\JsonLD\JsonLD once.

I don't have time to do a PR tonight, but I will eventually.