add extension class to playgrounds
- Merge branch 'develop' into test/move-to-playgrounds
- Merge pull request #503 from UniqueNetwork/feature/change-collection-owner
- chore fix code review
- chore update changelog
Rework bulk refungible mint
pallets/common/CHANGELOG.md1.3 KiBsourcehistoryadd extension class to playgrounds
Rework bulk refungible mint