fixes import from

It now supports `import * as deepFreeze from "deep-freeze";`

deep-freeze/deep-freeze.d.ts

@@ -3,7 +3,13 @@
 // Definitions by: Bart van der Schoor <https://github.com/Bartvds>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-declare module 'deep-freeze' {
-	function df<T>(obj: T): T;
-	export = df;
+declare module DeepFreeze {
+   export interface DeepFreezeInterface {
+      <T>(obj: T): T;
+    }
+}
+
+declare module "deep-freeze" {
+    let deepFreeze: DeepFreeze.DeepFreezeInterface;
+    export = deepFreeze;
 }