one more update for embedded_hal 1.0

src/lib.rs

@@ -189,7 +189,7 @@ impl KeyRows<$size> for $Type {
         use embedded_hal::digital::InputPin;
         match row {
             $(
-            $index => InputPin::is_low(&self.$row_name).map_err(drop),
+            $index => InputPin::is_low(&mut self.$row_name).map_err(drop),
             )+
             _ => unreachable!()
         }