message: Add back dependency on jsonwebtoken
diff: "@types/nconf": "^0.0.37",
  "@types/node": "^10.12.12",
  "debug": "^4.1.1",
  + "jsonwebtoken": "^8.4.0",
  "uuid": "^3.3.2"
  },
  "devDependencies": {
  "@microsoft/fluid-build-common": "^0.11.0",
  + "@types/jsonwebtoken": "^8.3.0",
  "concurrently": "^4.1.0",
  "rimraf": "^2.6.2",
  "tslint": "^5.11.0",
  