PHP 7.2 Compatibility (+ updated php-cs-fixer & PHPUnit)

[mrwogu]

No description provided.

[mrwogu]

Build passed successfully for:

• 7.0
• 7.1

but i don't know why for 7.2 i've got php-cs-fixer sugesstions on files which i didn't touch.
Maybe you have to think about php-cs-fixer update (current version is: 1.11.8)

[haphan]

I think we definitely should update some out-of-date dependencies like php-cs-fixer. Don't mind if you can update php-cs-fixer in this PR as well.

Support for php 7.2 will result in a new major version since there are some BC breaks.

[haphan]

@mrwogu BaseObject sounds misleading to me, at least from a developers perspective, BaseObject often use in the context of an abstract class.

What about using StorageObject instead?

[mrwogu]

Ok, i've renamed from Object to StorageObject.
php-cs-fixer has been updated and works fine now.

Unfortunately, PHPUnit is also outdated and I had to update it to a new version.
Could you check these errors?

[mrwogu]

@haphan could you merge this into php-opencloud:php-7.2?
I also rebased my branch with master.

[haphan]

Great works @mrwogu but I think commits got messed up during rebase.

Can you try to rebase it again?

[mrwogu]

@haphan done

[haphan]

@mrwogu Awesome works! 🎸

I've made only minor improvements to the README and php-cs-fixer.

Branch 2.0 will now contain version 2.x and master for 3.x.