PHP 8.0 compatiblity and dependency upgrades.

[jensdenies]

Q	A
Documentation	no
Bugfix	no
BC Break	no
New Feature	yes
RFC	no
QA	no

Description

This pull requests aims to make Mezzio PHP 8.0 compatible. I've bumped the dependencies to the lowest version that supports PHP 7.3 up until 8.0.

[jensdenies]

@lcobucci Tests seem to pass. 😃

mezzio/mezzio-aurarouter and mezzio/mezzio-template do not seem to have a PHP 8 compatible release yet (there are open PRs for that), that's why I had to ignore platform requirements in Travis.

[jensdenies]

Hi @boesing, @lcobucci, would you prefer holding this off until the PHP 8 upgrades for mezzio-template and mezzio-aurarouter are completed? 😀

[acelaya]

The one for mezzio-template has just been merged by @samsonasik and he released v2.1, so only aurarouter one is missing now.

[jensdenies]

@acelaya I've updated the dependency, thanks for notifying me! 👍

[lcobucci]

Sorry @jensdenies I had a crazy busy week. It looks good to me and I don't think we must wait for the other packages. The only thing we're missing here is the cleanup of the compatibility layer on whoops (the code and the phpstan config have some stuff for whoops v1).

[jensdenies]

@lcobucci No worries! I'll take a look! 😀

[jensdenies]

@lcobucci I've removed the obsolete code. 👍

[Ocramius]

Deferred removal of --ignore-platform-reqs to #62

[Ocramius]

🚢

[jensdenies]

Thanks @Ocramius and @lcobucci!

[jensdenies]

@Ocramius @lcobucci I just realized, the dependency upgrade wasn't actually necessary, right? Because Composer would've pulled the correct version anyway if there was a compatible PHP 8 release.

[lcobucci]

Sure, but it's definitely good to keep them updated (IMHO)

[jensdenies]

@lcobucci Cool, thought so too! It just occurred to me while I was updating another package, haha.