Add Support for latest laravel versions (7.x, 8.x)

[lamungu]

This PR's purpose is to add compatibility for backpack/base onto latest releases of Laravel 7.x and 8.x

Change involves composer.json's package list, akin to the last PR involving a Laravel upgrade (#403)

[welcome]

BOOM! Your first PR with us, thank you so much! Someone will take a look at it shortly.

Please keep in mind that:

• if this constitutes a breaking change, it might take quite a while for this to get merged; we try to emulate the Laravel release cycle as much as possible, so developers can upgrade both software once; this means a new big release every ~6 months;
• even if it's a non-breaking change, it might take a few days/weeks for the PR to get merged; unless it's a no-brainer, we like to have some community feedback on new features, before we merge them; this leads to higher-quality code, in the end; we learnt this the hard way :-)
• not all PRs get merged; sometimes we just have to hold out new features, to keep the packages lean; sometimes we don't include features that only apply to niche use cases;
• we're not perfect; if you think we're wrong, call us out on it; but in a kind way :-) we all make mistakes, best we learn from them and build better software together;

Thank you!

--
Justin Case
The Backpack Robot

[request-info]

Hi there!

Could you please provide us with more info about this? Looks like you skipped the title/body.

Thank you!

--
Justin Case
The Backpack Robot

[tabacitu]

Hi @lamungu ,

Thanks for the PR, but I'm pretty sure it's not that easy. In those versions Laravel has moved its Authentication to a different packages + a number of other breaking changes that would affect this package. And it will continue to do so, I'm certain.

TLDR:

• Backpack 4.x already offers support for Laravel 7.x and 8.x; and it does not use Backpack\Base at all; for using Backpack with Laravel 7.x, 8.x and above - please use Backpack 4.x;
• Backpack 3.x (which requires Backpack\Base) will not be receiving support for future versions of Laravel past 6.x, it's been superseded by Backpack 4.x (released more than one year ago - Sep 2019); and it's deprecated; it's not archived on Github just so that people who are unable to upgrade can still use it; but people really should be upgrading their apps;

Check out https://github.com/Laravel-Backpack/CRUD

Cheers!

[tabacitu]

PS. I've just updated the README so that the above is clearer. Sorry for that - looks like it wasn't clear at all. I've also marked the package as Abandoned on Packagist - hopefully this will nudge people into upgrading to 4.x

If this causes any problems to anyone, please let me know!