TextView does not show all lines when maxLines is combined with lineSpacing

### Problem description

Setting `maxLines` and `lineSpacing` on a `TextView` leads to text being cut of to early.

### Expected behavior

The text should be fully shown in the number of lines defined in the `maxLines` property.

### Environment

- Tabris.js version: 3.x
- Device: iPhone 6
- OS: iOS 12

### Code snippet

```jsx
import {contentView, TextView} from 'tabris';

contentView.append(
This is some
longer text which should wrap after it has covered a certain amount
space. This is some longer text which should wrap after it has
covered a certain amount space.
);
```