v0.1.0

Added

• Supervisor class which can safely supervise long running tasks.
• A new cli option engin check that validates whether you have any missing providers.
• Support for specifying default-instance in your pyproject.toml under [tool.engin]
  which is used as a default value for the app parameter when using the cli.
• A new exception class: TypeNotProvidedError.

Changed

• If a Provider is missing during Assembly, the Assembler now raises TypeNotProvidedError
  instead of a LookupError.
• engin graph has improved visualisations and options.
• engin check does not list all available providers anymore.