Merge branch 'tim/clippy_forward_compat' into 'master'

clippy: Allow unknown lints, so that new versions don't break

See merge request TankerHQ/sdk-rust!38

Author: tux3

run-ci.py

@@ -207,6 +207,8 @@ def test(self) -> None:
             "--",
             "--deny",
             "warnings",
+            "--allow",
+            "unknown-lints",
             cwd=self.src_path,
         )
         tankerci.run(