fix: update es modules in arrify

types/arrify/arrify-tests.ts

@@ -1,4 +1,4 @@
-import arrify = require("arrify");
+import * as arrify from 'arrify';
 
 arrify(null);
 arrify<number>(null);

types/arrify/index.d.ts

@@ -14,4 +14,5 @@
  * arrify([2, 3])    // returns [2, 3]
  */
 declare function arrify<T>(val: undefined | null | T | T[]): T[];
+declare namespace arrify {}
 export = arrify;