chore(deps): bump ipfs-core from 0.15.4 to 0.18.1

Bumps [ipfs-core](https://github.com/ipfs/js-ipfs) from 0.15.4 to 0.18.1.
- [Release notes](https://github.com/ipfs/js-ipfs/releases)
- [Changelog](https://github.com/ipfs/js-ipfs/blob/master/CHANGELOG.md)
- [Commits](ipfs/js-ipfs@ipfs-core-v0.15.4...ipfs-core-v0.18.1)

---
updated-dependencies:
- dependency-name: ipfs-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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