afvalcalendar: Add proper error handling

pkgs/afvalcalendar/src/main.rs

@@ -3,8 +3,13 @@ mod trash;
 
 #[tokio::main]
 async fn main() {
-    let dates = trash::get_pickup_dates().await.unwrap();
-    let calendar = calendar::calendar_from_pickup_dates(dates);
-
-    calendar.print().unwrap();
+    match trash::get_pickup_dates().await {
+        Ok(dates) => {
+            let calendar = calendar::calendar_from_pickup_dates(dates);
+            calendar.print().unwrap();
+        }
+        Err(error) => {
+            eprintln!("{}", error);
+        }
+    }
 }