Range is optional in cardinality expressions

[althonos]

Grammar allow optional DataRange in cardinality expressions:

ObjectMinCardinality := 'ObjectMinCardinality' '(' nonNegativeInteger ObjectPropertyExpression [ ClassExpression ] ')'
ObjectMaxCardinality := 'ObjectMaxCardinality' '(' nonNegativeInteger ObjectPropertyExpression [ ClassExpression ] ')'
ObjectExactCardinality := 'ObjectExactCardinality' '(' nonNegativeInteger ObjectPropertyExpression [ ClassExpression ] ')'

DataMinCardinality := 'DataMinCardinality' '(' nonNegativeInteger DataPropertyExpression [ DataRange ] ')'
DataMaxCardinality := 'DataMaxCardinality' '(' nonNegativeInteger DataPropertyExpression [ DataRange ] ')'
DataExactCardinality := 'DataExactCardinality' '(' nonNegativeInteger DataPropertyExpression [ DataRange ] ')'

so the code should be

DataMinCardinality {
    n: i32,
    dp: DataProperty,
    dr: Option<DataRange>
}