`createRoot` uses an unsupported syntax for IE11

[Tom L.]

• [ 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); 
 		} 
 	}; 
 }