Add cbor2 to tox.ini testenv deps for CBOR interoperability tests

Co-authored-by: polybassa <1676055+polybassa@users.noreply.github.com>

Author: Copilot

tox.ini

@@ -35,6 +35,7 @@ deps = mock
        cryptography
        coverage[toml]
        python-can
+       cbor2
        # disabled on windows because they require c++ dependencies
        # brotli 1.1.0 broken https://github.com/google/brotli/issues/1072
        brotli < 1.1.0 ; sys_platform != 'win32'