Notarization for osx release artifacts

**Feature description**

App notarization for OSX

**Is your feature request related to a problem? Please describe.**
[Notarization](https://developer.apple.com/news/?id=06032019i) for Mac apps, installer packages, and kernel extensions that are signed with Developer ID is enforced by Apple in order to run on macOS Catalina.

**Describe the solution you'd like**
Figure out and implement notarization for OSX wallet app.

**Additional context**
Add any other context about the problem here.

**Possible implementation**
- [ ] Implement requirements mentioned in [notarization guidelines](https://developer.apple.com/documentation/security/notarizing_your_app_before_distribution)
- [ ] Add `make` target for app notarization