Allow nette/utils ^4.0.0 (#32)

Composer: update dependencies

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

Composer: open 0.6.x

Allow Nette Utils 3.1, update dependencies for development

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

Open v0.5

Add phpstan/extension-installer

Fix LazyTracyLogger containing itself

Test LoggerHolder

Simplify extension test

Initial commit