restore google/auth, sync changes for 1.74.0

Author: shu-yusa

composer.json

@@ -8,7 +8,10 @@
   "version": "1.74.0",
   "require": {
     "php": ">=7.1.0",
-    "ext-grpc": "*"
+    "google/protobuf": "^v3.3.0"
+  },
+  "require-dev": {
+    "google/auth": "^v1.3.0"
   },
   "suggest": {
     "ext-protobuf": "For better performance, install the protobuf C extension.",

src/lib/UnaryCall.php

@@ -19,9 +19,13 @@
 
 namespace Grpc;
 
+use stdClass;
+
 /**
  * Represents an active call that sends a single message and then gets a
  * single response.
+ *
+ * @template T of \Google\Protobuf\Internal\Message
  */
 class UnaryCall extends AbstractCall
 {
@@ -50,7 +54,7 @@ public function start($data, array $metadata = [], array $options = [])
     /**
      * Wait for the server to respond with data and a status.
      *
-     * @return array [response data, status]
+     * @return array{0: T|null, 1: stdClass} [response data, status]
      */
     public function wait()
     {