Correct stdout, updating lib and some clippy clean

src/coords.rs

@@ -12,11 +12,11 @@ impl Coordinates {
     }
 
     pub fn is_correct_latitude(&self) -> bool {
-        return self.latitude > -90.0 && self.latitude < 90.0;
+        self.latitude > -90.0 && self.latitude < 90.0
     }
 
     pub fn is_correct_longitude(&self) -> bool {
-        return self.longitude > -180.0 && self.longitude < 180.0;
+        self.longitude > -180.0 && self.longitude < 180.0
     }
 }