feat: default Option<usize> return type in scaffold

src/bin/scaffold.rs

@@ -8,10 +8,10 @@ use std::{
     process,
 };
 
-const MODULE_TEMPLATE: &str = r###"pub fn part_one(input: &str) -> Option<u32> {
+const MODULE_TEMPLATE: &str = r###"pub fn part_one(input: &str) -> Option<usize> {
     None
 }
-pub fn part_two(input: &str) -> Option<u32> {
+pub fn part_two(input: &str) -> Option<usize> {
     None
 }
 fn main() {