set black min supported version (#302)

Author: eakmanrq

.pre-commit-config.yaml

@@ -18,6 +18,9 @@ repos:
       - id: black
         name: black
         language: system
+        args:
+          - --target-version
+          - py37
         entry: black
         require_serial: true
         files: *files

sqlmesh/schedulers/airflow/operators/targets.py

@@ -124,7 +124,7 @@ def post_hook(
         self,
         context: Context,
         session: Session = util.PROVIDED_SESSION,
-        **kwargs: t.Any
+        **kwargs: t.Any,
     ) -> None:
         VariableStateSync(session).add_interval(
             self.snapshot.snapshot_id,
@@ -236,7 +236,7 @@ def post_hook(
         self,
         context: Context,
         session: Session = util.PROVIDED_SESSION,
-        **kwargs: t.Any
+        **kwargs: t.Any,
     ) -> None:
         _delete_xcom(
             common.SNAPSHOT_TABLE_CLEANUP_XCOM_KEY,