message: Pin down to 3.1.10.
  It looks like 3.1.11 introduces a lot of TS errors.
  See
diff: "dependencies": {
  "@bentley/dev-cors-proxy-server": "0",
  "@types/chai": "^4.1.3",
  - "@types/enzyme": "^3.1.10",
  + "@types/enzyme": "3.1.10",
  "@types/mocha": "^5.2.1",
  "@types/node": "^10.3.2",
  "@types/sinon": "^5.0.1",
  