Update vendored dependencies

vendor/k8s.io/apimachinery/pkg/watch/mux.go

@@ -84,6 +84,13 @@ type functionFakeRuntimeObject func()
 func (obj functionFakeRuntimeObject) GetObjectKind() schema.ObjectKind {
 	return schema.EmptyObjectKind
 }
+func (obj functionFakeRuntimeObject) DeepCopyObject() runtime.Object {
+	if obj == nil {
+		return nil
+	}
+	// funcs are immutable. Hence, just return the original func.
+	return obj
+}
 
 // Execute f, blocking the incoming queue (and waiting for it to drain first).
 // The purpose of this terrible hack is so that watchers added after an event