trigger electrs when polling

src/database/keyvalue.rs

@@ -383,9 +383,9 @@ impl BatchDatabase for Tree {
 
 #[cfg(test)]
 mod test {
+    use lazy_static::lazy_static;
     use std::sync::{Arc, Condvar, Mutex, Once};
     use std::time::{SystemTime, UNIX_EPOCH};
-    use lazy_static::lazy_static;
 
     use sled::{Db, Tree};