Port changes from 2.x to fix some project warnings in master branch:
* Copy phase strip warning on binaries when building Distribution
* No app category set on Autoupdate
* -Watimport-in-framework-header warnings
* id messaging warnings
* -Wcompletion-handler warnings
* Some deprecated base64 APIs
* Explicit SDK and adhoc signing identity
* Upgrade project last update check
* Don't use manual ordering for building targets and set Sparkle.framework as dependency to XCFrameworks aggregate target
* Silenced WKWebView deprecation warning
* Fixed no output node warning in git config script by removing input node like in 2.x
Mayur Pawashe
ea14942643