Update client API endpoints to not use deprecated function

app/Repositories/Wings/DaemonPowerRepository.php

@@ -2,6 +2,25 @@
 
 namespace Pterodactyl\Repositories\Wings;
 
+use Webmozart\Assert\Assert;
+use Pterodactyl\Models\Server;
+use Psr\Http\Message\ResponseInterface;
+
 class DaemonPowerRepository extends DaemonRepository
 {
+    /**
+     * Sends a power action to the server instance.
+     *
+     * @param string $action
+     * @return \Psr\Http\Message\ResponseInterface
+     */
+    public function send(string $action): ResponseInterface
+    {
+        Assert::isInstanceOf($this->server, Server::class);
+
+        return $this->getHttpClient()->post(
+            sprintf('/api/servers/%s/power', $this->server->id),
+            ['json' => ['action' => $action]]
+        );
+    }
 }