feat: support unixfs metadata and formatting it (#14)#18

hugomrdias merged 1 commit intorelease/v0.4.xipfs/js-ipfs-utils:release/v0.4.xfrom

backport-unixfs-metadata-to-0.4.xipfs/js-ipfs-utils:backport-unixfs-metadata-to-0.4.xCopy head branch name to clipboard