Increase required version of swh.storage.

requirements-swh.txt

@@ -2,4 +2,4 @@ swh.core >= 0.0.44
 swh.model >= 0.0.15
 swh.objstorage >= 0.0.28
 swh.scheduler >= 0.0.35
-swh.storage >= 0.0.110
+swh.storage >= 0.0.112