updated migrations for CI4 beta.4

app/Database/Migrations/20181026110732_create_users_table.php

@@ -79,11 +79,7 @@ class Migration_create_users_table extends Migration
 				'type'    => 'DATETIME',
 				'default' => null,
 			],
-			'deleted' => [
+			'deleted_at DATETIME NOT NULL',
-				'type'       => 'TINYINT',
-				'constraint' => 1,
-				'default'    => 0,
-			],
 		]);
 		$this->forge->addKey('id', true);
 		$this->forge->createTable($config->dbTableUsers, true);

app/Database/Migrations/20181031064211_create_groups.php

@@ -53,11 +53,7 @@ class Migration_create_groups extends Migration
 			],
 			'created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP',
 			'updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP',
-			'deleted' => [
+			'deleted_at DATETIME NOT NULL',
-				'type'       => 'TINYINT',
-				'constraint' => 1,
-				'default'    => 0,
-			],
 		]);
 		$this->forge->addKey('id', true);
 		$this->forge->createTable($config->dbTableGroups, true);

app/Database/Migrations/20181031064714_create_perms.php

@@ -53,11 +53,7 @@ class Migration_create_perms extends Migration
 			],
 			'created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP',
 			'updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP',
-			'deleted' => [
+			'deleted_at DATETIME NOT NULL',
-				'type'       => 'TINYINT',
-				'constraint' => 1,
-				'default'    => 0,
-			],
 		]);
 		$this->forge->addKey('id', true);
 		$this->forge->createTable($config->dbTablePerms, true);