Allow usage of smmap 5.0 (#76)

Byron · Byron · commit 47a74ca590ef · 2021-10-23T08:29:50.000+08:00
diff --git a/gitdb/ext/smmap b/gitdb/ext/smmap
@@ -1 +1 @@
-Subproject commit 30e93fee57286afae25c28a97ba65a9770f9a729
+Subproject commit db8810096503dd8a1f5a021ff39be907417f90a7
diff --git a/requirements.txt b/requirements.txt
@@ -1 +1 @@
-smmap>=3.0.1,<5
+smmap>=3.0.1,<6
