Make rust text based approval tests pass

The main method for approval tests are supposed to run 30 days.
Previous impl was using an exclusive range.
Use an inclusive range instead.

rust/src/main.rs

@@ -18,7 +18,7 @@ fn main() {
     let mut rose = GildedRose::new(items);
 
     println!("OMGHAI!");
-    for i in 0..30 {
+    for i in 0..=30 {
         println!("-------- day {} --------", i);
         println!("name, sellIn, quality");
         for item in &rose.items {