Update protobuf to 5.28.1#361

pyup-bot wants to merge 4 commits intomasterRexGalilae/vasp-tools:masterfrom

pyup-update-protobuf-3.11.3-to-5.28.1RexGalilae/vasp-tools:pyup-update-protobuf-3.11.3-to-5.28.1Copy head branch name to clipboard