Fix vulnerable dependencies

[dethos]

Updated django and whitenoise to avoid:

36885: django <1.11.19,>=1.11.0 resolved (1.11.16 installed)!
Django 1.11.x before 1.11.19 allows Uncontrolled Memory Consumption via a malicious attacker-supplied value to the django.utils.numberformat.format() function.

37261: django <1.11.22,>1.11 resolved (1.11.16 installed)!
An issue was discovered in Django 1.11 before 1.11.22, 2.1 before 2.1.10, and 2.2 before 2.2.3. An HTTP request is not redirected to HTTPS when the SECURE_PROXY_SSL_HEADER and SECURE_SSL_REDIRECT settings are used, and the proxy connects to Django via HTTPS. In other words, django.http.HttpRequest.scheme has incorrect behavior when a client uses HTTP.

37275: whitenoise <4.1.3 resolved (3.3.0 installed)!
whitenoise 4.1.3 change: Fix potential path traversal attack while running in autorefresh mode on
Windows