upgrade [options] [installed_formula|installed_cask ...]
Upgrade outdated casks and outdated, unpinned formulae using the same options they were originally installed with, plus any appended brew formula options. If cask or
formula are specified, upgrade only the given cask or formula kegs (unless they are pinned; see pin, unpin).
Unless $HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK is set, brew upgrade or brew reinstall will be run for outdated dependents and dependents with broken linkage,
respectively.
Unless $HOMEBREW_NO_INSTALL_CLEANUP is set, brew cleanup will then be run for the upgraded formulae or, every 30 days, for all formulae.