Laravel 5.1 Unknown database type enum requested

public function up()
{
    Schema::table('users', function(Blueprint $table)
    {
        $table->dropColumn('name');
    });

    Schema::table('users', function(Blueprint $table)
    {
        $table->text('username');
    });
}

public function up()
{
    DB::statement('ALTER TABLE projects CHANGE slug url VARCHAR(200)');
}

public function down()
{
    DB::statement('ALTER TABLE projects CHANGE url slug VARCHAR(200)');
}

public function __construct()
{
    DB::getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');
}

use Doctrine\DBAL\Types\{StringType, Type};
use Illuminate\Database\Migrations\Migration;
use Illuminate\Support\Facades\{DB, Log};

/**
 * Class ExtendedMigration
 * Use it when the involved table(s) has enum type column(s)
 */
class ExtendedMigration extends Migration
{
    /**
     * ExtendedMigration constructor.
     * Handle Laravel Issue related with modifying tables with enum columns
     */
    public function __construct()
    {
        try {
            Type::hasType('enum') ?: Type::addType('enum', StringType::class);
            Type::hasType('timestamp') ?: Type::addType('timestamp', DateTimeType::class);
        } catch (\Exception $exception) {
            Log::info($exception->getMessage());
        }
    }
}

class SampleMigration extends ExtendedMigration
{
    public function up()
    {
        Schema::create('invitations', function (Blueprint $table) {
            ...
            $table->enum('status', ['sent', 'consumed', 'expired'])->default('sent');
            ...
        });
    }

    public function down()
    {
        Schema::dropIfExists('invitations');
    }
}

Schema::create('blogs', function (Blueprint $table) {
    $table->enum('type', [BlogType::KEY_PAYMENTS]);
    $table->index(['type', 'created_at']);
...

public function up(): void
{
    Schema::table('blogs', function (Blueprint $table) {
        $table->dropIndex(['type', 'created_at']);
        $table->enum('type_tmp', [
            BlogType::KEY_PAYMENTS,
            BlogType::KEY_CATS,
            BlogType::KEY_DOGS,
        ])->after('type');
    });

    DB::statement('update `blogs` as te set te.`type_tmp` = te.`type` ');

    Schema::table('blogs', function (Blueprint $table) {
        $table->dropColumn('type');
    });

    Schema::table('blogs', function (Blueprint $table) {
        $table->enum('type', [
            BlogType::KEY_PAYMENTS,
            BlogType::KEY_CATS,
            BlogType::KEY_DOGS,
        ])->after('type_tmp');
    });

    DB::statement('update `blogs` as te set te.`type` = te.`type_tmp` ');

    Schema::table('blogs', function (Blueprint $table) {
        $table->dropColumn('type_tmp');
        $table->index(['type', 'created_at']);
    });
}

public function up()
    {
DB::connection()->getDoctrineSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');

Schema::table('<YOUR_TABLE>', function (Blueprint $table) {
//YOUR CHANGES HERE
}    
    }

update Doctrine/DBAL/Schema/MySqlSchemaManager.php 

$this->_platform->registerDoctrineTypeMapping('enum', 'string');
$type = $this->_platform->getDoctrineTypeMapping($dbType);

doctrine:
    dbal:
        #other configuration
        mapping_types:
            enum: string