Start working on 6.3.0 release, update history.md - #339

Start working on 6.3.0 release, update history.md#339

dmitry-mukhin merged 3 commits into

mainuploadcare/pyuploadcare:mainfrom

chore/release-6.3.0uploadcare/pyuploadcare:chore/release-6.3.0Copy head branch name to clipboard