Support empty collections in `_embedded` section #306

Job	Run time
ci / Generate job matrix	9s
ci / QA Checks (PHPUnit [8.0, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	28s
ci / QA Checks (PHPUnit [8.0, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	31s
ci / QA Checks (PHPUnit [8.0, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	31s
ci / QA Checks (PHPUnit [8.1, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	25s
ci / QA Checks (PHPUnit [8.1, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	37s
ci / QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	31s
ci / QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	35s
ci / QA Checks (PHPCodeSniffer [8.0, locked], ubuntu-latest, laminas/laminas-continuous-integration-ac...	28s
ci / QA Checks (Psalm [8.0, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1, ...	45s
	5m 0s

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