Please add a license

[federico-razzoli]

Without a license, "nobody else can copy, distribute, or modify your work".

Reference: https://choosealicense.com/no-permission/

If this wasn't intentional, can you please add a license?

[homersimpsons]

Hello, there already is a license defined in composer.json:
https://github.com/thecodingmachine/tdbm/blob/master/composer.json#L13

I believe this is enough, no?

[federico-razzoli]

@homersimpsons I don't think that metadata in compose.json is legally sufficient. I believe that a note in the README is necessary, and it should include who owns the copyright and the release year(s). Including a LICENSE or COPYING file might be necessary, too.