added pytango as dependency to readthedocs

# .readthedocs.yml

# Read the Docs configuration file

# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details

# Required

version: 2

# Build documentation in the docs/ directory with Sphinx

sphinx:

  configuration: docs/src/conf.py

# Build documentation with MkDocs

#mkdocs:

#  configuration: mkdocs.yml

# Optionally build your docs in additional formats such as PDF and ePub

# formats: all

# Optionally set the version of Python and requirements required to build your docs

python:

  version: 3.7

  install:

    - requirements: docs/src/requirements.txt

# documentation root, use os.path.abspath to make it absolute, like shown here.

#

#import tango

import tango

#import skabase

autodoc_mock_imports = ['PyTango', 'tango', 'tango.server','run', 'DeviceMeta', 'command',

autodoc_mock_imports = ['PyTango','run', 'DeviceMeta', 'command',

                 'future', 'future.utils', 'logging', 'logging.handlers', 'ska',

                 'ska.base', 'SKAMaster', 'SKASubarray','numpy'

                 ]

PyTango==9.3.1