message: Unpin sanitize-html
  1.18.4 is now out which makes it work with webpack again
diff: "slate-react": "^0.12.4",
  "slate-html-serializer": "^0.6.1",
  "slate-md-serializer": "matrix-org/slate-md-serializer#f7c4ad3",
  - "sanitize-html": "1.18.2",
  + "sanitize-html": "^1.18.4",
  "text-encoding-utf-8": "^1.0.1",
  "url": "^0.11.0",
  "velocity-vector": "vector-im/velocity#059e3b2",
  