Bump whitenoise from 4.1.2 to 4.1.3

[dependabot-preview]

Bumps whitenoise from 4.1.2 to 4.1.3.

Changelog

Sourced from whitenoise's changelog.

v4.1.3

• Fix handling of zero-valued mtimes which can occur when running on some filesystems (thanks @​twosigmajab for reporting).
• Fix potential path traversal attack while running in autorefresh mode on Windows (thanks @​phith0n for reporting). This is a good time to reiterate that autofresh mode is never intended for production use.

Commits

• d3f2251 New release
• 7c3cd37 Don't set Last-Modified header if mtime is zero
• 44ea7a8 Merge pull request #224 from cabiad/flaskrst-typo-fix
• f8bba38 flask.rst - fix single character typo
• 5c93afd Merge pull request #218 from rsalmaso/build-matrix
• 9cb0abb Merge pull request #217 from rsalmaso/django3
• 6e33523 Drop python 3.5 check for django master (future 3.0)
• 54e30b2 Add Django 2.2 to the build matrix
• c4ad0bb Remove django.utils.six import (removed in django 3.0)
• 0e94fc1 Add download stats badge
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #175.