Karton-mwdb-reporter

New features and improvements:

- Support for `report_unrecognized` option to upload files not recognized by `karton.classifier` (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/32)
- Contents of configurations and blobs is not reuploaded when already in MWDB (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/30)

Bugfixes:

- Fixed error handling when upload size exceeds MWDB limit (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/27)
- Fixed command-line argument handling (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/37)
- Fixed `karton` attribute handling: tasks were crashing when `karton` appeared in `payload["attributes"]` section (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/35)

New features and improvements:

- `karton-core` bump to v5.0.0 (21)
- Small improvement in mwdblib password-based authentication (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/23)

New features and improvements:
- Support for blob reporting (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/15)
- Support for MWDB Core 2.6.0 API features e.g. JSON-like objects in attributes (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/14, https://github.com/CERT-Polska/karton-mwdb-reporter/pull/15)

This version drops support for Python 3.6

Bugfixes:
- Fixed handling of too big artifacts (https://github.com/CERT-Polska/karton-mwdb-reporter/pull/5)
- Fixed documentation and karton-core version pinning

Initial public release.