Use new gofumpt (#21613)

Update tinylib. Should fix CI.

`gofumpt -w .&&go generate ./...`

cmd/bucket-stats.go

@@ -38,7 +38,7 @@ type ReplicationLatency struct {
 // Merge two replication latency into a new one
 func (rl ReplicationLatency) merge(other ReplicationLatency) (newReplLatency ReplicationLatency) {
 	newReplLatency.UploadHistogram = rl.UploadHistogram.Merge(other.UploadHistogram)
-	return
+	return newReplLatency
 }
 
 // Get upload latency of each object size range
@@ -49,7 +49,7 @@ func (rl ReplicationLatency) getUploadLatency() (ret map[string]uint64) {
 		// Convert nanoseconds to milliseconds
 		ret[sizeTagToString(k)] = uint64(v.avg() / time.Millisecond)
 	}
-	return
+	return ret
 }
 
 // Update replication upload latency with a new value
@@ -64,7 +64,7 @@ type ReplicationLastMinute struct {
 
 func (rl ReplicationLastMinute) merge(other ReplicationLastMinute) (nl ReplicationLastMinute) {
 	nl = ReplicationLastMinute{rl.LastMinute.merge(other.LastMinute)}
-	return
+	return nl
 }
 
 func (rl *ReplicationLastMinute) addsize(n int64) {