message: chore(package): update chai to version 4.0.2
  * chore(package): update chai to version 4.0.2
  Closes
  * Use latest sinon-chai
diff: "babel-plugin-add-module-exports": "^0.2.1",
  "babel-preset-es2015": "^6.16.0",
  "body-parser": "^1.15.2",
  - "chai": "^3.5.0",
  + "chai": "^4.0.2",
  "express-session": "^1.14.2",
  "feathers": "^2.0.2",
  "feathers-authentication": "^1.0.0",
  "rimraf": "^2.5.4",
  "semistandard": "^11.0.0",
  "sinon": "^2.1.0",
  - "sinon-chai": "^2.8.0"
  + "sinon-chai": "^2.11.0"
  }
  }
  