Added children prop to make typescript happy

[DroidZed]

When I installed the package the typescript linter was spawning errors about the Menu component not accepting children.

When looked into the code, I noticed that the children prop was not found nor the Props interface was extending from the ViewProp interface to implicitly pass in the styles, testID, and children props.

A small fix was to have the children prop added to not clutter the auto completion for the component in the editor.

Also, the docs were mentioning the children prop being present while it's not. Please fix this asap.

Thank you.