bolt-extension-stencil apparently doesn't exist

[Maelstromeous]

Accroding to: https://github.com/bolt/docs/blob/3.5/docs/extensions/basics/about.md you should be able to install a very bare bones version of the extension system via the command:

composer create-project --no-install bolt/bolt-extension-stencil:^3.0 blah however there's an error of:

[InvalidArgumentException]
  Could not find package bolt/bolt-extension-stencil with version 3.0.