message: added cheerio as explicit dep in package.json
diff: "html-entities": "^1.3.1",
  "is-ip": "^2.0.0",
  "katex": "^0.12.0",
  + "cheerio": "^1.0.0-rc.3",
  "linkifyjs": "^2.1.9",
  "lodash": "^4.17.19",
  "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
  