Package iris_interface is missing dependencies

[c8y3]

Package iris_interface-1.1-py3-none-any.whl (as provided in iris-web/source/dependencies) is missing dependencies declarations, such as celery. This creates problems when coding modules that rely on iris_interface.
To reproduce:

python -m venv venv
source venv/bin/activate
pip install iris_interface-1.1-py3-none-any.whl 
python
>>> from iris_interface import IrisModuleInterface
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/ubuntu/tmp/venv/lib/python3.8/site-packages/iris_interface/IrisModuleInterface.py", line 26, in <module>
    from celery import Task, current_app, shared_task
ModuleNotFoundError: No module named 'celery'