[license] Add GPLv3 license to project

.mailmap

+# This file maps users that have used several mail adresses and user names
+# throughout their contribution history to a unique name-email pair.
+#
+# In each line, the second argument (email or name-email pair) is mapped to the
+# first argument (name-email pair). For example, to unify contributions by the
+# user "Albert Einstein", who commited with the following name-email pairs:
+#
+# Albert Einstein <albert.einstein@genius.com>
+# Albert <albert@smartguys.de>
+#
+# you would have to write:
+# Albert Einstein <albert.einstein@genius.com> Albert <albert@smartguys.de>
+
+Alexander Jaust <alexander.jaust@ipvs.uni-stuttgart.de> <alexander.jaust@uhasselt.be>
+
+Kilian Weishaupt <kilian.weishaupt@iws.uni-stuttgart.de>
\ No newline at end of file

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Not released yet
 
+- 2022-01-10: Add license file. The code is licensed under GPLv3 without template exception.
 - 2022-01-10: Tests run by the CI on DuMuX `master` are allowed to fail.
 - 2022-01-10: Added `CHANGELOG.md` to track changes of the adapter.
 

dune.module

@@ -4,9 +4,9 @@
 
 #Name of the module
 Module: dumux-precice
-Version: 3.0
+Version: develop
 Maintainer: alexander.jaust@ipvs.uni-stuttgart.de
 # Required build dependencies
-Depends: dumux
+Depends: dumux (>=3.2)
 # Optional build dependencies
-#Suggests: dune-subgrid
+Suggests: dune-subgrid