Implement Migration class to handle migrations

[jlenon7]

Description

Database class has the methods createTable and dropTable. But it does not have the same behavior that a Migration has with up and down method.

Usage example (this is just an example and could change when developing Schema):

import { Migration } from '@secjs/database'

export class UsersMigration extends Migration {
 protected tableName = 'users'

 public async up() {
 this.createTable(this.tableName, (table) => {
 table.increments('id').primary()
 table.string('name').nullable()
 table.timestamp('created_at', { useTz: true })
 table.timestamp('updated_at', { useTz: true })
 })
 }

 public async down() {
 this.dropTable(this.tableName)
 }
}

Package version

1.0.1