Require Latte 3.0.9, support PHP 8.3

• Support PHP 8.3 (#6)

Internal changes:

• Argument items are not null anymore (#5, requires Latte 3.0.9)
• Bump actions/checkout from 3 to 4 (#4, thanks @dependabot 🤖)

Update deps to support utils & robot-loader 4.0

• Update deps to support nette/utils & nette/robot-loader 4.0 (#3)

Add getIterator required by Latte 3.0.5

• Run tests on GitHub Actions (#1)
• Add getIterator required by Latte 3.0.5 (#2)

Initial release

v1.0.0

Add custom {icon} Latte tag for embedding SVG icons