Version number not displayed in release version of the app.

[marcnause]

Describe the bug
I the release version of the app the version number is not displayed in the "about us" screen. (Package downloaded from https://github.com/fossasia/pslab-app/tree/app)

Expected Behavior
The app displays the version number in the "about us" screen.

Steps to reproduce it

1. Download app from https://github.com/fossasia/pslab-app/tree/app
2. Install app
3. Start app
4. Open side menu (click on burger-menu icon)
5. Select "About us"

Screenshots of the issue

Locally compiled binary with version:

Downloaded binary without version:

System Information

Platform	Linux
Device	Laptop
OS Version	Debian Testing