Update dependencies

vendor/tailscale.com/util/set/handle.go

@@ -0,0 +1,28 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+package set
+
+// HandleSet is a set of T.
+//
+// It is not safe for concurrent use.
+type HandleSet[T any] map[Handle]T
+
+// Handle is an opaque comparable value that's used as the map key in a
+// HandleSet. The only way to get one is to call HandleSet.Add.
+type Handle struct {
+	v *byte
+}
+
+// Add adds the element (map value) e to the set.
+//
+// It returns the handle (map key) with which e can be removed, using a map
+// delete.
+func (s *HandleSet[T]) Add(e T) Handle {
+	h := Handle{new(byte)}
+	if *s == nil {
+		*s = make(HandleSet[T])
+	}
+	(*s)[h] = e
+	return h
+}