createRoot uses an unsupported syntax for IE11

[toml-pcentra]

• [ X ] Check if updating to the latest Preact version resolves the issue

Describe the bug
The createRoot uses the "method definition" syntax which is not supported in IE11:

preact/compat/client.js

Lines 3 to 12 in d18ac9f

	function createRoot(container) {
	return {
	render(children) {
	render(children, container);
	},
	unmount() {
	unmountComponentAtNode(container);
	}
	};
	}