Update flask_login to 0.4.1

[pyup-bot]

This PR updates flask_login from 0.4.0 to 0.4.1.

Changelog

0.4.1

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

Unreleased

- New config option USE_SESSION_FOR_NEXT to enable storing next url in session
instead of url. 330
- Accept int seconds along with timedelta for REMEMBER_COOKIE_DURATION. 370
- New config option FORCE_HOST_FOR_REDIRECTS to force host for redirects. 371

Links

• PyPI: https://pypi.org/project/flask-login
• Changelog: https://pyup.io/changelogs/flask-login/
• Repo: https://github.com/maxcountryman/flask-login
• Docs: http://pythonhosted.org/Flask-Login/

[pyup-bot]

Closing this in favor of #19