Issue #3367244 by idebr: Restore compatibility with Drupal 9

src/Encoder/Docx.php

@@ -41,7 +41,7 @@ class Docx implements EncoderInterface {
    *
    * @throws \Drupal\Component\Serialization\Exception\InvalidDataTypeException
    */
-  public function encode(mixed $data, string $format, array $context = []): string {
+  public function encode(mixed $data, $format, array $context = []): string {
     switch (gettype($data)) {
       case 'array':
         // Nothing to do.
@@ -103,7 +103,7 @@ class Docx implements EncoderInterface {
   /**
    * {@inheritdoc}
    */
-  public function supportsEncoding(string $format): bool {
+  public function supportsEncoding($format): bool {
     return $format === static::$format;
   }