Support empty collections in `_embedded` section #308

Job	Run time
ci / Generate job matrix	10s
ci / QA Checks (PHPUnit [8.0, locked], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	24s
ci / QA Checks (PHPUnit [8.0, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	24s
ci / QA Checks (PHPUnit [8.0, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	27s
ci / QA Checks (PHPUnit [8.1, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	24s
ci / QA Checks (PHPUnit [8.1, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	30s
ci / QA Checks (PHPUnit [8.2, lowest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	38s
ci / QA Checks (PHPUnit [8.2, latest], ubuntu-latest, laminas/laminas-continuous-integration-action@v1...	26s
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, ...	43s
	4m 34s

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