mypy: use __future__ uniformly in checked files

1 files changed, 4 insertions, 2 deletions

diff --git a/coverage/numbits.py b/coverage/numbits.py
index 99d53878..26e5c272 100644
--- a/coverage/numbits.py
+++ b/coverage/numbits.py
@@ -13,13 +13,15 @@ in the blobs should be considered an implementation detail that might change in
 the future.  Use these functions to work with those binary blobs of data.
 
 """
+
+from __future__ import annotations
+
 import json
+import sqlite3
 
 from itertools import zip_longest
 from typing import Iterable, List
 
-import sqlite3
-
 
 def nums_to_numbits(nums: Iterable[int]) -> bytes:
     """Convert `nums` into a numbits.