**Bug fixes**
- Allow ``canonical_json`` to work with iterators. (Kinto/kinto-signer167)
- Fixed inconsistencies in ``ResourceChanged`` produced by Kinto signer (Kinto/kinto-signer169)
- Update e2e.py to be robust against kinto_client returning an iterator in Python 3. (Kinto/kinto-signer165)
- Send kinto-signer before committing since some database may have to be performed
in the subscribers (Kinto/kinto-signer172)