Add a `pretend` mode to output SQL instead of running it

[elpete]

See:

https://github.com/laravel/framework/blob/6e927e78aafd578d59c99608e7f0e23a5f7bfc5a/src/Illuminate/Database/Console/Migrations/MigrateCommand.php

https://github.com/laravel/framework/blob/7.x/src/Illuminate/Database/Migrations/Migrator.php

[lhoess]

There is a pretend mode now according the the docs, but setting it to true still creates the table but not the migrations db entry.