Bump mixin-deep from 1.3.1 to 1.3.2 in /dynselect2

Bumps [mixin-deep](https://github.com/jonschlinkert/mixin-deep) from 1.3.1 to 1.3.2.
- [Release notes](https://github.com/jonschlinkert/mixin-deep/releases)
- [Commits](https://github.com/jonschlinkert/mixin-deep/compare/1.3.1...1.3.2

)

Signed-off-by: dependabot[bot] <support@github.com>

Feature/pwa optimization

# Conflicts:
#	schoolapps/dashboard/views.py
#	schoolapps/schoolapps/settings.py
#	schoolapps/schoolapps/urls.py
#	schoolapps/templates/common/404.html

Bugfix/404

Feature/pwa optimization

Dev 1.1

Feature/several days in one tex document #288

Bugfix/mobile plan

Change permissions for support views (issue #301)

Sort objects in plan overview (issue #303)

# Conflicts:
#	schoolapps/templates/partials/footer.html

Bugfix/no mobile smartplan