make TreeBuilder use compatible with Symfony 5.0

[cyrilverloop]

No description provided.

[carlos-mg89]

@cyrilverloop I'd be more than happy to take all these PRs you've sent to this repository and merge them into the repository I've just forked and published as a new composer package.

https://github.com/carlos-mg89/symfony-captcha-bundle

It might be a bit too much, but I though that a lot of effort was put into this library and it'd be very sad to let it rotten.

I've already included the related changes that you proposed in this very pull request for the Symfony 5.0 compatibility and have tested it in a project of my own successfully. However, it'd be awesome if you are keen to send these PRs into the forked repository so everyone benefits from those changes.

[cyrilverloop]

Hi,

Thanks for adding my updates to your fork.
New PRs don't seem necessary.
Is there something else you wanted me to do ?

[carlos-mg89]

Actually I've included the other PRs as well, since the project wasn't working on Symfony 5 at least.

And I included many more changes to make it fully compatible with Symfony 5. You can check it out if you fancy, I'm already using it in a project of mine and works like a charm.

Feel free to send PRs for additions or fixes. I'd be actively supporting it.

[cyrilverloop]

Good to know thanks.