message: Remove chai from devDependencies
  chai was both in dependencies and devDependencies. Since the package
  seems to use chai in public API, remove the devDependency
diff: "@types/node": "^12.0.8",
  "@types/serve-static": "^1.13.2",
  "body-parser": "^1.18.3",
  - "chai": "^4.0.2",
  "cross-env": "^6.0.3",
  "express": "^4.17.1",
  "mkpath": "^1.0.0",
  