Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.2.0
• Android Runtime: latest
• iOS Runtime: latest

Describe the bug
On Android, negative line height moves text lines together. On iOS, negative line height has no effect.

To Reproduce
https://play.nativescript.org/?template=play-ng&id=UGy1ZI

Expected behavior
The moving text together effect should be the same on both platforms.

Sample project
https://play.nativescript.org/?template=play-ng&id=UGy1ZI