[BUG] InvalidKeyNameError is raised with a know valid key

The list of valid key names longer than a single character (i.e. the names of non-printable keys) is incomplete. This results in a `InvalidKeyNameError` being thrown when you try and use a valid key like `up` with the `ObserveKeys` `only` prop.

```javascript
ObserveKeys only={["up"]}> // Throws InvalidKeyNameError
  // ...
</ObserveKeys>
```
