PHP 8.4 compatibility

[mikkamp]

We are bundling this library within our extension through composer and we've been working on PHP 8.4 compatibility and I ran into several deprecation messages about using an explicit nullable type.

Deprecated: Vendor\Google\Client::authorize(): Implicitly marking parameter $http as nullable is deprecated, the explicit nullable type must be used instead in vendor/google/apiclient/src/Client.php on line 451

-    public function authorize(ClientInterface $http = null)
+    public function authorize(?ClientInterface $http = null)

Deprecated: Vendor\Google\Client::fetchAccessTokenWithAssertion(): Implicitly marking parameter $authHttp as nullable is deprecated, the explicit nullable type must be used instead in vendor/google/apiclient/src/Client.php on line 318

-        public function fetchAccessTokenWithAssertion(ClientInterface $authHttp = null)
+        public function fetchAccessTokenWithAssertion(?ClientInterface $authHttp = null)

Implicitly marking parameter $previous as nullable is deprecated, the explicit nullable type must be used instead
vendor/google/apiclient/src/Service/Exception.php:39

    public function __construct(
        $message,
        $code = 0,
-        Exception $previous = null,
+        ?Exception $previous = null,
        $errors = []
    ) {

Environment details

• OS: multiple
• PHP version: 8.4
• Package name and version: google/apiclient

[cococaline]

i face the same issue on php 8.4

[mikkamp]

Seems there is already a PR that resolves these issues: #2638

Included in the 2.18.1 release.