see #402

BREAKING CHANGE: ipns resolve now supports paths, so the return type is
now `{ path: string, cid: CID }` instead of just `CID`

\#### Before

\```typescript
const cidFromPeerId = await ipns.resolve(peerId)
const cidFromDnsLink = await ipns.resolve(domainName)
\```

\#### After

\```typescript
const { cid, path } = await ipns.resolve(peerId)
const { cid, path } = await ipns.resolve(domainName)
\```