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*(2021-04-16)*
- Added SSH connectivity with the Fabric library
- :class:`~sai_airflow_plugins.hooks.fabric_hook.FabricHook`,
:class:`~sai_airflow_plugins.operators.fabric_operator.FabricOperator` and
:class:`~sai_airflow_plugins.sensors.fabric_sensor.FabricSensor`
- Added Mattermost integration
- :class:`~sai_airflow_plugins.hooks.mattermost_webhook_hook.MattermostWebhookHook` and
:class:`~sai_airflow_plugins.operators.mattermost_webhook_operator.MattermostWebhookOperator`
- Added conditional operator mixin that skips when the condition is False
- :class:`~sai_airflow_plugins.operators.conditional_skip_mixin.ConditionalSkipMixin`
- several conditional operators in :mod:`~sai_airflow_plugins.operators.conditional_operators` and
:mod:`~sai_airflow_plugins.sensors.conditional_sensors`