Update dateparser to 0.7.1

[pyup-bot]

This PR updates dateparser from 0.7.0 to 0.7.1.

Changelog

0.7.1

------------------

Features/news:

* Added detected language to return value of `search_dates()`
* Performance improvements
* Refreshed versions of dependencies

Improvements:

* Fixed unpickleable `DateTime` objects with timezones
* Fixed regex pattern to avoid new behaviour of re.split in Python 3.7
* Fixed an exception thrown when parsing colons
* Fixed tests failing on days with number greater than 30
* Fixed `ZeroDivisionError` exceptions

Links

• PyPI: https://pypi.org/project/dateparser
• Changelog: https://pyup.io/changelogs/dateparser/
• Repo: https://github.com/scrapinghub/dateparser

[pyup-bot]

Closing this in favor of #7