Nanos

What's Changed
* Docs with sphinx https://nanos.readthedocs.io/en/stable/index.html
* Updated dev dependencies
* Added `py.typed` to make `mypy` happier


**Full Changelog**: https://github.com/aleosd/nanos/compare/v0.1.4...v0.1.5

* Couple more `datetime`-related utils;
* `tz` info is optional

* Changes timer's `verbose` output

* Adds human-readable file size formatting function
* Adds function to remove empty members from list or dict
* Refactors `Timer`'s API

Initial release