add: rel prop support to Link

To enable the link component to be used by Shopify app navMenu Links

Author: chr33s

polaris-react/src/components/Link/Link.tsx

@@ -18,6 +18,8 @@ export interface LinkProps {
    * @deprecated use `target` set to `_blank` instead
    */
   external?: boolean;
+  /** The relationship of the linked URL as space-separated link types. */
+  rel?: string;
   /** Where to display the url */
   target?: Target;
   /** Makes the link color the same as the current text color and adds an underline */
@@ -37,6 +39,7 @@ export function Link({
   children,
   onClick,
   external,
+  rel,
   target,
   id,
   monochrome,
@@ -60,6 +63,7 @@ export function Link({
             onClick={onClick}
             className={className}
             url={url}
+            rel={rel}
             external={external}
             target={target}
             id={id}

polaris-react/src/components/UnstyledLink/UnstyledLink.tsx

@@ -31,7 +31,7 @@ export const UnstyledLink = memo(
       target = targetProp ?? undefined;
     }
 
-    const rel = target === '_blank' ? 'noopener noreferrer' : undefined;
+    const rel = props.ref ?? target === '_blank' ? 'noopener noreferrer' : undefined;
 
     return (
       <a