Merge pull request #94 from Jakub-Fajkus/php-81

PHP 8.1

Merge pull request #93 from pechondra/3813-new-nette-requirements

Use newer composer requirements for nette/utils and symfony/console

Merge pull request #91 from pechondra/replace-strict-object-for-smart…

…-object

Replace Kdyby\StrictObject for Nette\SmartObject

Merge pull request #88 from Kdyby/cs-fix

cs fix

Merge pull request #72 from Kdyby/feature/php-7.2

Test against PHP 7.2

bump branch alias

bump branch alias

Travis: use kdyby/code-checker

Allow build against kdyby/events 3.0

tests: pass with older symfony