Automatically updates the TYPO3 CMS core to its latest minor release if these criterias are met:
It only works under Unix and MacOS (needs symlink support).
typo3_src must be a symlink.
Symlink needs to be writable (and deletable) by the web server user.
Document root needs to be writable.
One path above document root (../) needs to be writable (new directories need to be allowed to be created).
The tar command must be available for extracting the Source package.
Composer Mode is active. Please update using composer commands. The environment variable was set TYPO3_DISABLE_CORE_UPDATER=1. This system isn't a released TYPO3 version. This action can only be used with a linked typo3_src.