Bump mkdocs from 0.17.5 to 1.0.4
Bump mkdocs from 0.17.5 to 1.0.4

Bumps [mkdocs](https://github.com/mkdocs/mkdocs) from 0.17.5 to 1.0.4.
- [Release notes](https://github.com/mkdocs/mkdocs/releases)
- [Commits](https://github.com/mkdocs/mkdocs/compare/0.17.5...1.0.4)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
sloria/django-rest-marshmallow,tomchristie/django-rest-marshmallow