`alwaysShowTitle` property makes `ariaHidden` to be always `false`

[dmitrij-borchuk]

As we can see here https://github.com/dericcain/react-tiny-fab/blob/master/src/index.tsx#L52

Setting alwaysShowTitle as true forcing ariaHidden to be always false. That makes buttons unaccessible (hard to write correct tests using this component and probably makes problem for people who use screen readers).