This homebrew tap is no longer supported

SHTOOLS is now part of homebrew-core and can be installed by

brew install shtools

This homebrew tap will now longer be supported beyond version 4.8. If you have been using this brew tap to install SHTOOLS, please do the following:

brew uninstall shtools
brew untap shtools/shtools
brew install shtools

For more information

SHTOOLS web site: shtools.oca.eu/shtools/
SHTOOLS at GitHub: SHTOOLS/SHTOOLS