Added arrow function in below files (#4061)

at.js

@@ -15,8 +15,6 @@ import baseAt from './.internal/baseAt.js'
  * at(object, ['a[0].b.c', 'a[1]'])
  * // => [3, 4]
  */
-function at(...paths) {
-  return baseAt(paths)
-}
+const at = (...paths) => baseAt(paths)
 
 export default at

attempt.js

@@ -21,7 +21,7 @@ import isError from './isError.js'
  */
 function attempt(func, ...args) {
   try {
-    return func.apply(undefined, args)
+    return func(...args)
   } catch (e) {
     return isError(e) ? e : new Error(e)
   }