`Warning: Unknown prop `referrerPolicy` on <a> tag.`

`referrerPolicy` is defined by the WHATWG HTML for e.g. `a` elements (https://html.spec.whatwg.org/multipage/semantics.html#the-a-element). Also see https://w3c.github.io/webappsec-referrer-policy/

radioGroup: 0,
    readOnly: HAS_BOOLEAN_VALUE,
    rel: 0,
    required: HAS_BOOLEAN_VALUE,
    reversed: HAS_BOOLEAN_VALUE,
    role: 0,
    rows: HAS_POSITIVE_NUMERIC_VALUE,
    rowSpan: HAS_NUMERIC_VALUE,
    sandbox: 0,
    scope: 0,
    scoped: HAS_BOOLEAN_VALUE,
    scrolling: 0,
    seamless: HAS_BOOLEAN_VALUE,
    selected: MUST_USE_PROPERTY | HAS_BOOLEAN_VALUE,
    shape: 0,
    size: HAS_POSITIVE_NUMERIC_VALUE,
    sizes: 0,
    span: HAS_POSITIVE_NUMERIC_VALUE,
    spellCheck: 0,
    src: 0,
    srcDoc: 0,
    srcLang: 0,
    srcSet: 0,
    start: HAS_NUMERIC_VALUE,
    step: 0,
    style: 0,
    summary: 0,
    tabIndex: 0,
    target: 0,
    title: 0,