We have it in [`setup.py`](https://github.com/twingly/twingly-search-api-python/blob/5fea52b68d89b0be4fd49f9a6e2da3e7255eb63a/setup.py#L19) and [`twingly_search/__init__.py`](https://github.com/twingly/twingly-search-api-python/blob/5fea52b68d89b0be4fd49f9a6e2da3e7255eb63a/twingly_search/__init__.py#L7) (only two digits here, so maybe we are well aware of it?) Perhaps in setup.py we can use the version from `__init__.py` [like html5lib does](https://github.com/html5lib/html5lib-python/blob/f796cca5f9ddaaf1e1a8b872f68455551cd3ae2d/setup.py#L36-L46).