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• I have read the whole migration guide

Is there an existing issue that is already proposing this?

• I have searched the existing issues

Potential Commit/PR that introduced the regression

92df199

Versions

7.4.2 -> 8.0.0

Describe the regression

SchemaObjectMetadata, which is used by the @ApiProperty decorator, has become more restrictive. Previously, type could be any string (amongst others). Now, if the type is 'object', it must also provide properties, and required applies to... the properties of the object itself?
I would assume the minimum reproduction code is a valid JSONSchema. How do I express it using the @ApiProperty decorator?

Minimum reproduction code

@ApiProperty({
    required: true,
    description: 'Some description.',
    type: 'object',
    additionalProperties: { type: 'boolean' },
})

Expected behavior

The minimum reproduction code compiles.

Other

No response