Release build network connectivity issue caused by OkHttp3 and ProGuard

[SirionRazzer]

This is an issue I heavily struggled with - it is necessary to change package name in following lines inside the model-rules.pro file:

-keep class <my-package>.domain.model.** { *; }
-keep class <my-package>.data.net.dto.** { *; }

[lopspower]

Yes, if you change the project's package name, you have to change it everywhere.