Completely restored authorization_code grant for user side.

Reworked oauth_sessions table.
Added extension to use MariaDB's JSON columns.
Rewritten tests for authorization_code grant for client side.
Deprecate some old shit.
[skip ci]

common/db/mysql/QueryBuilder.php

@@ -1,8 +1,10 @@
 <?php
+declare(strict_types=1);
+
 namespace common\db\mysql;
 
+use SamIT\Yii2\MariaDb\QueryBuilder as MysqlQueryBuilder;
 use yii\db\ExpressionInterface;
-use yii\db\mysql\QueryBuilder as MysqlQueryBuilder;
 
 class QueryBuilder extends MysqlQueryBuilder {
 

common/db/mysql/Schema.php

@@ -1,12 +1,20 @@
 <?php
+declare(strict_types=1);
+
 namespace common\db\mysql;
 
-use yii\db\mysql\Schema as MysqlSchema;
+use SamIT\Yii2\MariaDb\JsonExpressionBuilder;
+use SamIT\Yii2\MariaDb\Schema as MysqlSchema;
 
 class Schema extends MysqlSchema {
 
     public function createQueryBuilder() {
-        return new QueryBuilder($this->db);
+        $result = new QueryBuilder($this->db);
+        $result->setExpressionBuilders([
+            'yii\db\JsonExpression' => JsonExpressionBuilder::class,
+        ]);
+
+        return $result;
     }
 
 }