Lib2nbdev

Make lib2nbdev compatible with the latest fastcore and nbdev versions.

Pinned the `fastcore` and `nbdev` versions due to a change in how `Config` is read in. 0.0.9 will include changes for compatibility

Bugs Squashed
- `generate_actions` is not defined ([7](https://github.com/Novetta/lib2nbdev/issues/7))

New Features

- Include generation of foundational documentation ([5](https://github.com/Novetta/lib2nbdev/issues/5))
- Include automatic generation of pypi package configuration ([4](https://github.com/Novetta/lib2nbdev/issues/4))

Bugs Squashed
- Generate more clear error messages with `lib_path` ([3](https://github.com/Novetta/lib2nbdev/issues/3))
- Avoid unclear error when a github workflow already exists ([6](https://github.com/Novetta/lib2nbdev/pull/6)) Thanks daviddemeij!