Made element returned by useOutlet have stable reference

Author: Malien

packages/react-router/lib/hooks.tsx

@@ -320,12 +320,15 @@ export function useOutletContext<Context = unknown>(): Context {
  */
 export function useOutlet(context?: unknown): React.ReactElement | null {
   let outlet = React.useContext(RouteContext).outlet;
-  if (outlet) {
-    return (
-      <OutletContext.Provider value={context}>{outlet}</OutletContext.Provider>
-    );
-  }
-  return outlet;
+  return React.useMemo(
+    () =>
+      outlet && (
+        <OutletContext.Provider value={context}>
+          {outlet}
+        </OutletContext.Provider>
+      ),
+    [outlet, context]
+  );
 }
 
 /**