I also agree with the @MASNathan.
The vendor folder should not be under the version control.
If you want to keep the dependencies version, you can just let the composer.lock be under the version control.

Yeah, you're right, much simpler that way. I'll apply it from now on.

Creating it in JSON format was to give it availability from other languages, but we can leave it as an extra resource and maintain the array you created.

The version in the composer.json, unless there's some weighty reason, I'll keep it. I use it for reference and in some libraries to get the current version.

A doubt, why static instead of self in MimeTypesCollection.php?

Thanks for your contribution! 👍

I'm glad I could help.

I used static instead of ´self´ because that way if someone wants to extend the collection and change the value of the property, it'll be inherited/accessible by the parent class methods. You can find more information on StackOverflow about that.

I dropped the json file because if it's not php we have to read the file and parse it, if it's already in php format, these steps are not needed, which might have some performance benefits.