problems with tests and SQLAlchemy 2.* (w/patch)

[mcepl]

If you decided ever to care for SQLAlchemy 2.* after all, then this patch makes the test suite pass:

---
 mautrix/client/state_store/tests/store_test.py |    4 +++-
 mautrix/util/db/base.py                        |    7 +++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

--- a/mautrix/client/state_store/tests/store_test.py
+++ b/mautrix/client/state_store/tests/store_test.py
@@ -13,6 +13,7 @@ import pathlib
 import random
 import string
 import time
+import unittest

 import asyncpg
 import pytest
@@ -64,11 +65,12 @@ async def async_sqlite_store() -> AsyncI

 @asynccontextmanager
 async def alchemy_store() -> AsyncIterator[SQLStateStore]:
+    raise unittest.SkipTest("SQLAlchemy tests should be skipped.")
     db = sql.create_engine("sqlite:///:memory:")
     Base.metadata.bind = db
     for table in (RoomState, UserProfile):
         table.bind(db)
-    Base.metadata.create_all()
+    Base.metadata.create_all({})
     yield SQLStateStore()
     db.dispose()

--- a/mautrix/util/db/base.py
+++ b/mautrix/util/db/base.py
@@ -10,7 +10,10 @@ from sqlalchemy import Constraint, Table
 from sqlalchemy.dialects.postgresql import insert as pg_insert
 from sqlalchemy.engine.base import Connection, Engine
 from sqlalchemy.ext.declarative import as_declarative, declarative_base
-from sqlalchemy.sql.base import ImmutableColumnCollection
+try:
+    from sqlalchemy.sql.base import ImmutableColumnCollection as ReadOnlyColumnCollection
+except ImportError:
+    from sqlalchemy.sql.base import ReadOnlyColumnCollection
 from sqlalchemy.sql.expression import ClauseElement, Select, and_

 if TYPE_CHECKING:
@@ -33,7 +36,7 @@ class BaseClass:
     db: Engine
     t: Table
     __table__: Table
-    c: ImmutableColumnCollection
+    c: ReadOnlyColumnCollection
     column_names: List[str]

     @classmethod