.(dot) character is not being accepted in database name

CodeIgniter 4.02 version

Direction
set databasename in .env file. for example

Code:

database.default.hostname = localhost
database.default.database = 'ci4.0.2'
database.default.username = root
database.default.password = root
database.default.DBDriver = MySQLi

Created : users table

PHP Code:

<?php namespace App\Database\Migrations;

use CodeIgniter\Database\Migration;

class Users extends Migration
{
public function up()
{
$this->forge->addField([
            'id'          => ['type' => 'INT', 'constraint' => 5, 'unsigned' => true, 'auto_increment' => true],
'name' => ['type' => 'VARCHAR', 'constraint' => 50],
'address'      => ['type' => 'VARCHAR', 'constraint' => 100],
'email'      => ['type' => 'VARCHAR', 'constraint' => 50],
            'contact'      => ['type' => 'VARCHAR', 'constraint' => 10],
            'created_at'  => ['type' => 'datetime', 'null' => true],
            'updated_at'  => ['type' => 'datetime', 'null' => true],
            'deleted_at'  => ['type' => 'datetime', 'null' => true],
        ]);

        $this->forge->addPrimaryKey('id');
        $this->forge->createTable('users', false, ['ENGINE' => 'InnoDB']);
}

//--------------------------------------------------------------------

public function down()
{
//
}
} 


Describe the bug

Code:

E:\work\htdocs\ci4\public>php spark migrate

CodeIgniter CLI Tool - Version 4.0.2 - Server-Time: 2020-03-12 02:36:40am

Running all new migrations...

> You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '.`0`.`2`' at line 1
> E:\work\htdocs\ci4\public\vendor\codeigniter4\framework\system\Database\MySQLi\Connection.php - 330

Expected behavior
.(dot) character should be allowed in database.default.database

• OS: [Windows 8.1]
  
• Web server [Apache 2.4.1] (wampp)
  
• PHP version [7.4.3]