60.1: Replace updater.sh with updater-supervisor * Implement updater-supervisor (Python library and executable in the same time intended for non-interactive usage of pkgupdate. It newly implements features like approvals or notifications generation. Also there are multiple new features such as postrun hooks or ensure run.) * Obsolete updater.sh (intended replacement for CLI is pkgupdate and for automatic task updater-supervisor) * Use system tools instead of shipped ones for some test cases * Clean and refactor continuous integration tests