fix(PubSub): publisher compression type (#6417)

Co-authored-by: Yash Sahu <54198301+yash30201@users.noreply.github.com>

Author: vishwarajanand

src/BatchPublisher.php

@@ -65,9 +65,15 @@ class BatchPublisher
      */
     private $client;
 
-    private bool $enableCompression;
+    /**
+     * @var bool
+     */
+    private $enableCompression;
 
-    private int $compressionBytesThreshold;
+    /**
+     * @var int
+     */
+    private $compressionBytesThreshold;
 
     /**
      * @param string $topicName The topic name.

src/Topic.php

@@ -89,10 +89,15 @@ class Topic
      */
     private $clientConfig;
 
-    private bool $enableCompression;
-
+    /**
+     * @var bool
+     */
+    private $enableCompression;
 
-    private int $compressionBytesThreshold;
+    /**
+     * @var int
+     */
+    private $compressionBytesThreshold;
 
     /**
      * Create a PubSub topic.