Fixed compilation noise

src/gtfs/mod.rs

@@ -101,7 +101,7 @@ impl Gtfs<'_> {
         
 
     /// Load a GTFS structure from a zip file
-    pub fn load(prefs: &Preferences) -> Result<Gtfs, Error> {
+    pub fn load(prefs: &Preferences) -> Result<Gtfs<'_>, Error> {
 
         _ = refresher::refresh(prefs);