Update nicfit.py to 0.6.6

[pyup-bot]

There's a new version of nicfit.py available.
You are currently using 0.6.5. I have updated it to 0.6.6

These links might come in handy: PyPI | Changelog | Repo

Changelog

0.6.6

---

New

- ConfigOpts.init_logging_fileConfig for invoking logging.config.fileConfig.
- :class:`nicfit.logger.FileConfig` supports instance creation and
 better utilities for updating config.
- The companion to ``getlist`` :meth:`Config.setlist`

Changes

- Pdb_opt (i.e. --pdb) is addded by default.

Fix

- <cmd> help <subcmd> works again.
- No f-strings in py35.

Other

- Update pyaml from 17.8.0 to 17.10.0 (155) <github-botpyup.io>
- Update pytest from 3.2.2 to 3.2.3 (154) <github-botpyup.io>
- Update tox from 2.8.2 to 2.9.1 (153) <github-botpyup.io>
- Update pip-tools from 1.9.0 to 1.10.1 (151) <github-botpyup.io>
- Update sphinx from 1.6.3 to 1.6.4 (149) <github-botpyup.io>
- Update pytest-asyncio from 0.7.0 to 0.8.0 (148) <github-botpyup.io>

Got merge conflicts? Close this PR and delete the branch. I'll create a new PR for you.

Happy merging! 🤖

[coveralls]

Coverage remained the same at 30.471% when pulling 2cb05f7 on pyup-update-nicfit.py-0.6.5-to-0.6.6 into 1b5a08d on master.

[coveralls]

Coverage remained the same at 30.471% when pulling d63a4d0 on pyup-update-nicfit.py-0.6.5-to-0.6.6 into 1803a07 on master.