Update .gitattributes

[voku]

Do not copy the test directory into the project, if we install it via composer.

[williamdes]

I can not approve this because Debian uses the tests/ folder to run autopkg tests: https://salsa.debian.org/phpmyadmin-team/sql-parser/-/blob/debian/latest/debian/tests/phpunit
Output: https://salsa.debian.org/phpmyadmin-team/sql-parser/-/jobs/2353133

[voku]

@williamdes Understand. Do you think we could use the "exclude"-setting in the composer.json here? 🤔

e.g.:

{
    "archive": {
        "exclude": ["/tests"]
    }
}

⇒ https://getcomposer.org/doc/04-schema.md#archive

[williamdes]

@williamdes Understand. Do you think we could use the "exclude"-setting in the composer.json here? thinking

Does it really work ?
Answer: yes
I accept to add this, can you edit your PR ?
Answer: Done in a201314

[williamdes]

This was released right now 🎉