try to satisfy psalm

Author: gam6itko

src/AbstractLapiClient.php

@@ -15,7 +15,7 @@
 abstract class AbstractLapiClient extends AbstractClient
 {
     /**
-     * @var TBouncerConfig
+     * @var array|TBouncerConfig
      */
     protected $configs;
     /**
@@ -30,7 +30,7 @@ public function __construct(
     ) {
         $this->configure($configs);
         $this->headers = [Constants::HEADER_LAPI_USER_AGENT => $this->formatUserAgent($this->configs)];
-        if (!empty($this->configs['api_key'])) {
+        if (isset($this->configs['api_key'])) {
             $this->headers[Constants::HEADER_LAPI_API_KEY] = $this->configs['api_key'];
         }
         parent::__construct($this->configs, $requestHandler, $logger);

src/Configuration.php

@@ -40,7 +40,7 @@
  */
 class Configuration extends AbstractConfiguration
 {
-    /** @var list<string> The list of each configuration tree key */
+    /** @var string[] The list of each configuration tree key */
     protected $keys = [
         'user_agent_suffix',
         'user_agent_version',