Update direct dependencies where possible

vendor/github.com/jpillora/backoff/backoff.go

@@ -71,7 +71,8 @@ func (b *Backoff) ForAttempt(attempt float64) time.Duration {
 	//keep within bounds
 	if dur < min {
 		return min
-	} else if dur > max {
+	}
+	if dur > max {
 		return max
 	}
 	return dur
@@ -86,3 +87,13 @@ func (b *Backoff) Reset() {
 func (b *Backoff) Attempt() float64 {
 	return b.attempt
 }
+
+// Copy returns a backoff with equals constraints as the original
+func (b *Backoff) Copy() *Backoff {
+	return &Backoff{
+		Factor: b.Factor,
+		Jitter: b.Jitter,
+		Min:    b.Min,
+		Max:    b.Max,
+	}
+}