Support passing focusOptions to react-focus-lock

[cee-chen]

As of 2.7.0, react-focus-lock has supported a focusOptions prop, primarily for allowing consumers to pass preventScroll to the initial focus event. react-focus-on unfortunately has not exposed nor is passing that prop directly to react-focus-lock, which potentially leads to scroll jumping issues that cannot be overridden (see theKashey/react-focus-lock#162 for more info).

It should be relatively trivial to pull focusOptions from props and pass it directly to <ReactFocusLock> here: https://github.com/theKashey/react-focus-on/blob/master/src/UI.tsx#L49