This wants to be a small PR to improve the usability of the library, based on this conversation: https://twitter.com/grifotv/status/1127847192067215360.
Since the release of RNS there has been a new major player in the React game: hooks. And sadly `useScreens` recalls too closely Hooks, and this can lead to misunderstanding.
Changing it to `enableScreens` will make the difference clear, but at the same time it will be a BREAKING CHANGE for everyone using the lib.
So if we prefer to keep it around as useScreens I'm ok with it too, and we can close this.
Also, I did some tweaks to the README + fix some typos.
The docs do not state that react-native-screens is also used by default for the tab and drawer navigators. I updated the docs to include that. I didn't see support in any of the other navigators that I looked at, but if there are any others, we should update the documentation for them as well.
Updating a really minor typo in the readme: `s/enojy/enjoy`.
Here it is in context:
```markdown
3. That's all 🎉 – enjoy faster navigation in your Expo app. Keep in mind screens are in pretty early phase so please report if you discover some issues.
```
