Add tests

Composer: allow nette/utils 4.x

Code: modernize (codesniffer, phpstan, gitignore, editorconfig)

Improve Tracy panel

Composer.json: Allow Tracy ^2.8

QA: update codesniffer

Composer: open 3.3.x

Bump: 3.1.0

Add support for Tracy 2.7

Signed-off-by: Roman Ondráček <ondracek.roman@centrum.cz>

Nette 3