Add dedicated websockets package
Ref:
There used to be a package automatically installed; not anymore I guess. This came from a separate package and not cookiecutter-django, but the installation was similar.
@@ -25,6 +25,7 @@ flower==0.9.5 # https://github.com/mher/flower
{%- endif %}
{%- if cookiecutter.use_async == 'y' %}
uvicorn==0.12.1 # https://github.com/encode/uvicorn
+wsproto==0.15.0 # https://github.com/python-hyper/wsproto/
{%- endif %}
# Django
