Upgrade PHP to 7.3 and fix some related code errors. Disable self_accessor fixer for PHP-CS-Fixer

api/config/config-dev.php

@@ -1,16 +1,9 @@
 <?php
 return [
-    'bootstrap' => ['debug'],
     'components' => [
         'reCaptcha' => [
             'public' => '6LfwqCYTAAAAAJlaJpqCdzESCjAXUC81Ca6jBHR7',
             'secret' => '6LfwqCYTAAAAAFPjHmgwmnjSMFeAOJh7Lk5xxDMC',
         ],
     ],
-    'modules' => [
-        'debug' => [
-            'class' => yii\debug\Module::class,
-            'allowedIPs' => ['*'],
-        ],
-    ],
 ];

api/config/config-prod.php

@@ -1,9 +0,0 @@
-<?php
-return [
-    'components' => [
-        'reCaptcha' => [
-            'public' => getenv('RECAPTCHA_PUBLIC'),
-            'secret' => getenv('RECAPTCHA_SECRET'),
-        ],
-    ],
-];

api/config/config.php

@@ -67,6 +67,8 @@ return [
         ],
         'reCaptcha' => [
             'class' => api\components\ReCaptcha\Component::class,
+            'public' => getenv('RECAPTCHA_PUBLIC'),
+            'secret' => getenv('RECAPTCHA_SECRET'),
         ],
         'response' => [
             'format' => yii\web\Response::FORMAT_JSON,