prepare for release: update changelog and copyright hints

debian/changelog

+python-pytest-asyncio (0.16.0-1) unstable; urgency=medium
+
+  [ upstream ]
+  * new release
+
+ -- Jonas Smedegaard <dr@jones.dk>  Mon, 08 Nov 2021 16:02:10 +0100
+
 python-pytest-asyncio (0.15.1-1) unstable; urgency=medium
 
   [ upstream ]

debian/copyright_hints

@@ -22,7 +22,6 @@ Files: Makefile
  tests/async_fixtures/test_async_fixtures_scope.py
  tests/async_fixtures/test_async_fixtures_with_finalizer.py
  tests/async_fixtures/test_async_gen_fixtures.py
- tests/async_fixtures/test_coroutine_fixtures.py
  tests/async_fixtures/test_nested.py
  tests/conftest.py
  tests/markers/test_class_marker.py
@@ -55,10 +54,10 @@ License: Apache-2.0
  FIXME
 
 Files: debian/source/lintian-overrides
-Copyright: Apache-2.0
-  GPL-3+
-  apache-2.0
-  gpl-3+
+Copyright: debian/copyright Apache-2.0
+  debian/copyright GPL-3+
+  debian/copyright apache-2.0
+  debian/copyright gpl-3+
 License: UNKNOWN
  FIXME