When you install Aiflow with an extra, the required provider packages should be installed automatically.

For example:

`pip instal apache-airflow[google]` should install apache-airlfow-providers-google package.
setup.py
"microsoft.winrm": winrm,
    "mongo": mongo,
    "mysql": mysql,
    "odbc": odbc,
    "openfaas": [],
    "opsgenie": [],
    "oracle": oracle,
    "pagerduty": pagerduty,
    "papermill": papermill,
    "plexus": plexus,
    "postgres": postgres,
    "presto": presto,
    "qubole": qds,
    "redis": redis,
    "salesforce": salesforce,
    "samba": samba,
    "segment": segment,
    "sftp": ssh,
    "singularity": singularity,
    "slack": slack,
    "snowflake": snowflake,
    "sqlite": [],
    "ssh": ssh,
    "vertica": vertica,
    "yandex": yandexcloud,
    "zendesk": zendesk,
}
EXTRAS_REQUIREMENTS: Dict[str, Iterable[str]] = {
    'all_dbs': all_dbs,
    'amazon': amazon,