Add new defer_relation argument to mock_model (dbt-labs#520)

* add new `defer_relation` argument to `mock_model`

* changie

* exclude redshift-connector==2.0.912 (dbt-labs#519)

.changes/unreleased/Fixes-20230706-001056.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Fix regression in redshift-connector==2.0.912
+time: 2023-07-06T00:10:56.337407-04:00
+custom:
+  Author: mikealfare
+  Issue: "518"

.changes/unreleased/Fixes-20230706-012233.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Fixed unit test that broke following dbt clone work
+time: 2023-07-06T01:22:33.840137-04:00
+custom:
+  Author: mikealfare
+  Issue: "518"

setup.py

@@ -85,7 +85,7 @@ def _core_version(plugin_version: str = _plugin_version()) -> str:
         f"dbt-core~={_core_version()}",
         f"dbt-postgres~={_core_version()}",
         "boto3~=1.26.26",
-        "redshift-connector~=2.0.911",
+        "redshift-connector~=2.0.911,!=2.0.912",
         # installed via dbt-core but referenced directly; don't pin to avoid version conflicts with dbt-core
         "agate",
     ],

tests/unit/test_context.py

@@ -147,6 +147,7 @@ def mock_model():
         raw_sql="",
         description="",
         columns={},
+        defer_relation=None,
     )