updated vendor

vendor/github.com/klauspost/compress/zstd/encoder.go

@@ -138,11 +138,18 @@ func (e *Encoder) Reset(w io.Writer) {
 func (e *Encoder) ResetWithOptions(w io.Writer, opts ...EOption) error {
 	e.o.resetOpt = true
 	defer func() { e.o.resetOpt = false }()
+	hadDict := e.o.dict != nil
 	for _, o := range opts {
 		if err := o(&e.o); err != nil {
 			return err
 		}
 	}
+	hasDict := e.o.dict != nil
+	if hadDict != hasDict {
+		// Dict presence changed — encoder type must be recreated.
+		e.state.encoder = nil
+		e.init = sync.Once{}
+	}
 	e.Reset(w)
 	return nil
 }
@@ -448,6 +455,12 @@ func (e *Encoder) Close() error {
 	if s.encoder == nil {
 		return nil
 	}
+	if s.w == nil {
+		if len(s.filling) == 0 && !s.headerWritten && !s.eofWritten && s.nInput == 0 {
+			return nil
+		}
+		return errors.New("zstd: encoder has no writer")
+	}
 	err := e.nextBlock(true)
 	if err != nil {
 		if errors.Is(s.err, ErrEncoderClosed) {