Fix issue with gino imports (#1282)

fastapi_pagination/ext/sqlalchemy.py

@@ -16,7 +16,7 @@
 
 from sqlalchemy import func, select, text
 from sqlalchemy.exc import InvalidRequestError
-from sqlalchemy.orm import FromStatement, Query, Session, noload, scoped_session
+from sqlalchemy.orm import Query, Session, noload, scoped_session
 from sqlalchemy.sql.elements import TextClause
 from typing_extensions import TypeAlias, deprecated, no_type_check
 
@@ -32,6 +32,15 @@
     from sqlalchemy.sql import Select
 
 
+try:
+    from sqlalchemy.orm import FromStatement
+except ImportError:
+
+    class FromStatement:  # type: ignore
+        def __init__(self, *args: Any, **kwargs: Any) -> None:
+            raise ImportError("sqlalchemy.orm.FromStatement is not available")
+
+
 try:
     from sqlalchemy.util import await_only, greenlet_spawn
 except ImportError:  # pragma: no cover