[New software proposal] Update notifier script

[kkovaletp]

I've developed the Bash shell script to be run in the background and check for updates of installed software and send notifications with the results. Right now it checks Homebrew, Mac AppStore, PIP, NPM global packages, Node.JS default LTS version; updates PIPX installed packages, and does little housekeeping.
The script is a template, which works for me, but most probably needs to be modified according to a user's needs. It could be found in my repo with a description in Readme and scheduling PLIST.
You can publish it in Development, System, Utilities sections, but feel free to decide which sections are appropriate.