add changelog for upcoming release v3.5.0

Author: ubaumann

release_notes/v3.5.0.md

@@ -0,0 +1,9 @@
+# Release Notes for Nuts 3.5.0
+
+The latest version of NUTS, 3.5.0, removes Python 3.8 support and introduces a `nuts-init` tool to bootstrap a new project.
+
+* Bugfix/pkg resources deprecated warning by @ubaumann in https://github.com/network-unit-testing-system/nuts/pull/120
+* nuts-init helper script by @ubaumann in https://github.com/network-unit-testing-system/nuts/pull/123
+* Remove Python 3.8 support by @ubaumann in https://github.com/network-unit-testing-system/nuts/pull/123
+
+**Full Changelog**: https://github.com/network-unit-testing-system/nuts/compare/v3.4.0...v3.5.0