Fix ToAsciiArrayTrait::to_ascii_array return reversed array (#193)

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## Pull Request type

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Please check the type of change your PR introduces:

- [ ] Bugfix

## What is the current behavior?

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Currently, when I use `ToAsciiArrayTrait::to_ascii_array()`, it behaves
the same as `ToAsciiArrayTrait::to_inverse_ascii_array()` and returns
reversed array (123.to_ascii_array() == array!['3', '2', '1']).
The reason behind it is that `to_ascii_array()` reverses the array but
returns the unmodified array (because `ArrayTraitExt::reverse()` does
not mutate)

Issue Number: N/A

## What is the new behavior?

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this PR. -->

- to_ascii_array() now returns ascii array with a correct order
(123.to_ascii_array() == array!['1', '2', '3'])

## Does this introduce a breaking change?

- [ ] Yes, for code that relied on this buggy behavior
- [ ] No, for any other code

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impact and migration path for existing applications below. -->

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src/ascii/src/interger.cairo

@@ -29,8 +29,7 @@ impl ToAsciiArrayTraitImpl<
 > of ToAsciiArrayTrait<T> {
     fn to_ascii_array(self: T) -> Array<felt252> {
         let mut new_arr = self.to_inverse_ascii_array();
-        new_arr.reverse();
-        new_arr
+        new_arr.reverse()
     }
 
     fn to_inverse_ascii_array(self: T) -> Array<felt252> {