Add parentOrganization property/tag to schema_organization

Problem/Motivation

I work at a university and we need to use the 'CollegeOrUniversity' Schema.org Metatag. However, the current 'schema_organization' tag does not include a 'parentOrganization' property, which is required for the 'CollegeOrUniversity' schema type.

Proposed resolution

Add a 'parentOrganization' property to 'schema_organization'
This is our desired output for our specific use case of Schema Organizations:

<script type="application/ld+json">
{
	"@context": "https://schema.org/",
	"@type": "CollegeOrUniversity",
	"name": "University of Arizona {{Department/College}}",
	"url": "{{Department/College url}}",
	"description": "{{Description of department/college}}",
	"logo": "{{Department/College logo}}",
	"image": "{{Image to represent department/college}}",
	"sameAs": "{{comma separated social media URLs}}",
	"address": {
		"@type": "PostalAddress",
		"streetAddress": "{{Street Address}}",
		"addressLocality": "{{City}}",
		"addressRegion": "{{2 letter state abbreviation}}",
		"postalCode": "{{5 digits}}",
		"addressCountry": "{{Country abbreviation}}"
	},
	"telephone": "{{+1-555-555-5555}}",
	"email": "{{Department/College email address}}",
	"parentOrganization": {
		"@type": "EducationalOrganization",
		"name": "University of Arizona",
		"url": "https://www.arizona.edu/",
		"address": {
			"@type": "PostalAddress",
			"streetAddress": "1401 E University Blvd",
			"addressLocality": "Tucson",
			"addressRegion": "AZ",
			"postalCode": "85721",
			"addressCountry": "US"
		}
	}
}
</script>