hard pin to latest compatible version (#530)

* hard pin to latest compatible version

* min ver for cname usage
https://github.com/aws/amazon-redshift-python-driver/blob/eb2776686037ff47f07fd30d4726323cc43b872c/redshift_connector/iam_helper.py#L118

* redshift specific

* Update setup.py

.changes/unreleased/Fixes-20230713-105351.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: hard pin dep on redshift_connector
+time: 2023-07-13T10:53:51.463072-04:00
+custom:
+  Author: dataders
+  Issue: 531 532

setup.py

@@ -84,8 +84,10 @@ def _core_version(plugin_version: str = _plugin_version()) -> str:
     install_requires=[
         f"dbt-core~={_core_version()}",
         f"dbt-postgres~={_core_version()}",
-        "boto3~=1.26.26",
-        "redshift-connector~=2.0.911",
+        "boto3~=1.26.157",
+        # dbt-redshift depends deeply on this package. it does not follow SemVer, therefore there have been breaking changes in previous patch releases
+        # Pin to the patch or minor version, and bump in each new minor version of dbt-redshift.
+        "redshift-connector==2.0.913",
         # installed via dbt-core but referenced directly; don't pin to avoid version conflicts with dbt-core
         "agate",
     ],