fix tests

types/raf/index.d.ts

@@ -7,6 +7,6 @@ declare const raf: {
   (callback: (timestamp: number) => void): number;
   cancel: (handle: number) => void;
   polyfill: (globalObject?: any) => void;
-}
+};
 
 export = raf;

types/raf/raf-tests.ts

@@ -1,4 +1,4 @@
-import raf from "raf";
+import * as raf from "raf";
 
 const handle = raf((timestamp) => {
   timestamp; // $ExpectType number