Upgrade nette

[Spamercz]

Composer require PHP >= 7.1

Travis and Composer cleanup

• Unified travis.yml
• Added PHPStan to travis
• Added CodingStandard to travis
• removed unused nette libraries
• Added PHPStan
• Added Kdyby/CodingStandard
• Moved PHPCoveralls to composer
• Added Typo3/ClassAliasLoader

Exception split to own files

• Old namespaces aliased

Other

• Local php ini for tests
• Removed unused register method
• Nette framework version resolving not to be dependent on nette/application
• fixed onShutdown event for PHPStan onShutdown only magically calls foreach on property, so i did it here too.
• \Kdyby\StrictObjects\Scream is not compatible with Nette/SmartObject

unused arguments in tests reported by PHPStan

• so use them as if it was application
• added to properties and made getters

TODO

• needs kdyby/events update to nette 3.0