Update randomElements to return random number of elements when no count is provided

Author: calebdw

docs/formatters/numbers-and-strings.md

@@ -92,16 +92,16 @@ echo $faker->randomLetter();
 
 ## `randomElements`
 
-Returns `$count` amount of random element from the given array, traversable, or enum. By default, the `$count` parameter is set to 1.
+Returns `$count` amount of random element from the given array, traversable, or enum. By default, the `$count` parameter is set to a random number of elements.
 
 ```php
 echo $faker->randomElements(['a', 'b', 'c', 'd', 'e']);
 
-// ['c']
+// ['c', 'b', 'a']
 
 echo $faker->randomElements(new \ArrayIterator(['a', 'b', 'c', 'd', 'e']));
 
-// ['c']
+// ['c', 'd']
 
 enum Bar
 {
@@ -114,7 +114,7 @@ enum Bar
 
 echo $faker->randomElements(Bar::class);
 
-// ['c']
+// ['c', 'a']
 
 echo $faker->randomElements(['a', 'b', 'c', 'd', 'e'], 3);