Update version in dune.module file to 2.11-git

dune.module

@@ -2,11 +2,11 @@
 # SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 
 Module: dune-istl
-Version: 2.10
+Version: 2.11-git
 Author: The Dune Core developers
 Maintainer: dune-devel@lists.dune-project.org
 Description: Iterative solver template library which provides generic sparse matrix/vector classes and a variety of solvers based on these classes
 URL: https://gitlab.dune-project.org/core/dune-istl
 Python-Requires:
-Depends: dune-common (>= 2.10)
+Depends: dune-common (>= 2.11)
 Whitespace-Hook: Yes