ISSUE-350353: Add gitlab CI.

Closes #3503543

src/FileLinkQueueItem.php

@@ -58,7 +58,7 @@ final class FileLinkQueueItem {
    * @param int|null $time
    *   The timestamp.
    */
-  public function __construct(string $type, int $id, string $lang = Language::LANGCODE_NOT_SPECIFIED, int $revisionId = NULL, int $time = NULL) {
+  public function __construct(string $type, int $id, string $lang = Language::LANGCODE_NOT_SPECIFIED, ?int $revisionId = NULL, ?int $time = NULL) {
     $this->type = $type;
     $this->id = $id;
     $this->lang = $lang;