v0.6.0

• Fixed bug causing a private key to be generated when it already existed
• Updated min docker version to 19.0.0
• Updated min lando version to 3.0.0-rc.23
• Updated min node version to 12.16.0
• Updated min yarn version to 1.13.0
• Updated Yarn install process to use --ignore-dependencies rather than --without-node
• Updated dependencies to resolve security vulnerabilities