chore(main): release 1.2.1 (#224)

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>

Author: release-please[bot]

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## [1.2.1](https://github.com/googleapis/python-spanner-sqlalchemy/compare/v1.2.0...v1.2.1) (2022-08-09)
+
+
+### Bug Fixes
+
+* alembic migration fails in case of a sequential upgrade ([#200](https://github.com/googleapis/python-spanner-sqlalchemy/issues/200)) ([f62f664](https://github.com/googleapis/python-spanner-sqlalchemy/commit/f62f664f31ec052068e241729344aec5f605c4f8))
+* don't reset attributes of non-Spanner connections ([#222](https://github.com/googleapis/python-spanner-sqlalchemy/issues/222)) ([072415e](https://github.com/googleapis/python-spanner-sqlalchemy/commit/072415eb9ea0bf701be2a35c4cc3dc80854ca831))
+* incorrect DDL generated when using server_default ([#209](https://github.com/googleapis/python-spanner-sqlalchemy/issues/209)) ([#220](https://github.com/googleapis/python-spanner-sqlalchemy/issues/220)) ([7ab1742](https://github.com/googleapis/python-spanner-sqlalchemy/commit/7ab174233dc75fd34d4127cb06dd49c216d92abc))
+
+
+### Documentation
+
+* add a note about connection URL prefixes ([#219](https://github.com/googleapis/python-spanner-sqlalchemy/issues/219)) ([a986949](https://github.com/googleapis/python-spanner-sqlalchemy/commit/a9869498f220a529a1dcc51c89d53af54311074c))
+
 ## [1.2.0](https://github.com/googleapis/python-spanner-sqlalchemy/compare/v1.1.0...v1.2.0) (2022-06-03)
 
 

version.py

@@ -4,4 +4,4 @@
 # license that can be found in the LICENSE file or at
 # https://developers.google.com/open-source/licenses/bsd
 
-__version__ = "1.2.0"
+__version__ = "1.2.1"