**Description**
It would be nice if the azure-storage-blob dependency for apache-airflow-providers-microsoft-azure was upgraded to a more recent version that 2.1.0. 

**Use case / motivation**

The version 12.4.0 will allow us to perform OAuth refresh token operations for long running tasks. We use this to authenticate against our datalake, and it's currently not possible with the version 2.1.0 that airflow uses. 


**Related Issues**

The 12.x version is 100% incompatible with the 2.x versions. The API has changed drastically between the two versions, so all the airflow azure operators will need to be changed and fixed. 

setup.py
"""
    Return sphinx theme version. If USE_THEME_FROM_GIT env variable is set, the theme is used from
    GitHub to allow dynamically update it during development. However for regular PIP release
    you cannot use @ package specification, so the latest available released theme package from
    PIP is used.
    :return: Version of sphinx theme to use.
    """
    if os.environ.get('USE_THEME_FROM_GIT'):
        return (
            "@ https://github.com/apache/airflow-site/releases/download/0.0.4/"
            + "sphinx_airflow_theme-0.0.4-py3-none-any.whl"
        )
    return ''
amazon = [
    'boto3>=1.15.0,<1.16.0',
    'botocore>=1.18.0,<1.19.0',
    'watchtower~=0.7.3',
]
apache_beam = [
    'apache-beam[gcp]',
]
async_packages = [
    'eventlet>= 0.9.7',
    'gevent>=0.13',
    'greenlet>=0.4.9',
]