core: let Link accept any element type as component

.changeset/eighty-queens-explode.md

@@ -0,0 +1,5 @@
+---
+'@backstage/core': patch
+---
+
+Link `component` prop now accepts any element type.

packages/core/src/components/Link/Link.tsx

@@ -14,12 +14,20 @@
  * limitations under the License.
  */
 
-import React, { ComponentProps } from 'react';
-import { Link as MaterialLink } from '@material-ui/core';
-import { Link as RouterLink } from 'react-router-dom';
+import React, { ElementType } from 'react';
+import {
+  Link as MaterialLink,
+  LinkProps as MaterialLinkProps,
+} from '@material-ui/core';
+import {
+  Link as RouterLink,
+  LinkProps as RouterLinkProps,
+} from 'react-router-dom';
 
-type Props = ComponentProps<typeof MaterialLink> &
-  ComponentProps<typeof RouterLink> & { component?: React.ReactNode };
+type Props = MaterialLinkProps &
+  RouterLinkProps & {
+    component?: ElementType<any>;
+  };
 
 /**
  * Thin wrapper on top of material-ui's Link component