Missing intersphinx mapping file

[PhilippSelenium]

When including dataclasses_json in my project I cannot create an interpshinx mapping using the objects.inv file I have to exclude certain members of dataclasses_json in order to get the sphinx build running:

    :no-show-inheritance:
    :exclude-members: __eq__, __init__, __repr__, to_dict, to_json, schema, from_dict, from_json