Changelog is missing for the 6.x release

[stof]

Bumping the major version implies that there might be BC breaks, so not having any readme looks weird to me.

[jossef]

the release notes are auto generated from the commit changes (via semantic-release) https://github.com/jossef/material-design-icons-iconfont/releases/tag/v6.1.0

I did bumped the major. sorry if that confuses you from now on the major will not bump unless there are breaking changes