New features:
- Added `remove_comment` function in MWDBObject (https://github.com/CERT-Polska/mwdblib/pull/87, thanks msm-code!)
Bugfixes:
- Fixed `mwdb login --api-key` that was failing silently to store API key (thanks v-rzh for bug report https://github.com/CERT-Polska/mwdblib/issues/90 and Repumba for fix https://github.com/CERT-Polska/mwdblib/pull/92)