Fix Python 3.7 compatibility problem

diff --git a/src/disk_jumble/db.py b/src/disk_jumble/db.py
index 9e881080ab1ce8ec60e36bece8a5a2b4804480e3..34c24b62dbc3db6e19ef7bb60c86ea5ac531acc2 100644 (file)
--- a/src/disk_jumble/db.py
+++ b/src/disk_jumble/db.py
@@ -1,3 +1,4 @@
+from __future__ import annotations
 from dataclasses import dataclass
 from typing import Iterable, Mapping, Optional
 import datetime as dt