[ticket/12870] phpbbcli.php db:migrate can not update from 3.0.12 to 3.1
* Nicofuma/ticket/12870:
[ticket/12870] Add doc block
[ticket/12870] Create the migrations table with a method in the migrator
[ticket/12870] Add $config['version'] in phpbb_extension_manager_test
[ticket/12870] Create the migrations table in db:migrate