travisci and styleci configuration upgrade

[Glavic]

Before we continue resolving all the issues and PR's, travisci and styleci should return successful builds. Based on that all this files were modified, which don't break anything.

[briannesbitt]

Does changing the function type hints from Carbon to self affect code editors offering type hints? I seem to remember this being done and then reverted for some reason. (Maybe I am thinking of the return types)

[kylekatarnls]

This would mean IDE bug. With eq(self $dt) PHPStorm says me eq needs a Carbon instance.

If someone complaints his IDE does not support, I would suggest to report an issue to the IDE owner.

[Glavic]

@briannesbitt: I cannot find any history in src/Carbon/Carbon.php that contains self $dt, so this was probably never implemented?

I have tried PHPstorm and vscode; all autocomplete are working...

[kylekatarnls]

vscode and PHPStorm have the same autocomplete engine so it's not so objective XD

[kylekatarnls]

But even if it would fail, it should not be taken into account. IDE does not support all magic methods properly but it's not a reason to avoid them. IDE plugins have to evolve according to new features not the opposite.

[kylekatarnls]

All good for me.

[kylekatarnls]

This should be committed in an other PR I think.

[Glavic]

Because I also wanted to solve phpcs errors.

[briannesbitt]

Ya, looks like I was thinking of the return value. (static|Carbon|self) and working nicely with phpdoc. I think I am good to go here.

[Ovsyanka]

Why it is not merged yet? When it will be? Just want to know because I waiting to rebase my PRs.

[kylekatarnls]

Hi @Ovsyanka this PR is only 2-hours old and it's a big one. Double-checking it will avoid you to rebase multiple times ;)