Add Async support for SMTP Notifier

providers/slack/src/airflow/providers/slack/notifications/slack_webhook.py

@@ -21,6 +21,7 @@
 from typing import TYPE_CHECKING
 
 from airflow.providers.common.compat.notifier import BaseNotifier
+from airflow.providers.common.compat.version_compat import AIRFLOW_V_3_1_PLUS
 from airflow.providers.slack.hooks.slack_webhook import SlackWebhookHook
 
 if TYPE_CHECKING:
@@ -64,7 +65,11 @@ def __init__(
         retry_handlers: list[RetryHandler] | None = None,
         **kwargs,
     ):
-        super().__init__(**kwargs)
+        if AIRFLOW_V_3_1_PLUS:
+            #  Support for passing context was added in 3.1.0
+            super().__init__(**kwargs)
+        else:
+            super().__init__()
         self.slack_webhook_conn_id = slack_webhook_conn_id
         self.text = text
         self.attachments = attachments

providers/smtp/pyproject.toml

@@ -59,6 +59,7 @@ requires-python = ">=3.10"
 dependencies = [
     "apache-airflow>=2.10.0",
     "apache-airflow-providers-common-compat>=1.6.1",
+    "aiosmtplib>=0.1.6",
 ]
 
 [dependency-groups]