dep: adapt to changes of rand-0.8: gen_range() accepts a range instead of two args

Author: drmingdrmer

async-raft/src/config.rs

@@ -127,7 +127,7 @@ impl Config {
 
     /// Generate a new random election timeout within the configured min & max.
     pub fn new_rand_election_timeout(&self) -> u64 {
-        thread_rng().gen_range(self.election_timeout_min, self.election_timeout_max)
+        thread_rng().gen_range(self.election_timeout_min..self.election_timeout_max)
     }
 }
 

async-raft/src/metrics_wait_test.rs

@@ -145,5 +145,6 @@ fn init_wait_test() -> (RaftMetrics, Wait, watch::Sender<RaftMetrics>) {
         timeout: Duration::from_millis(100),
         rx,
     };
-    return (init, w, tx);
+
+    (init, w, tx)
 }