Fragment as the default base component

[vitaliiznak]

In most cases Fragment is a better choice as a base component, which allows to not pollute DOM with unneeded divs

[khmelevskii]

Thank you @vitaliiznak for this idea. I can't replace default component from div to Fragment because we need to support backward compatibility. But I will add simple way to use use Fragment in Base.
So, I will add the following:

<Base component="<>" ... />