Merge pull request #4 from md-systems/8.x

_embedded can contain multiple referenced for multi-value fields.
Merge pull request #6 from md-systems/8.x

Move to PSR-4
Issue #697760 by jibran: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).
Merge pull request #7 from jibran/removed-getInfo

Replace getInfo() in tests with native phpDoc