Upgrading DevTools
Upgrade devtools CLI
Homebrew
If you installed devtools via Homebrew, you can check for updates by running
brew update
brew upgrade devtools
Testing your installation.
Run devtools doctor to confirm the system is in good working order.
Upgrading your Docker Host
If your brew upgrade happens to also update docker, when running devtools doctor you 
may get a warning about an incompatible Docker version in your Docker Host VM. In that case use the
devtools upgrade command to upgrade your Docker Host VM to a compatible version.