message: increment the SDK version to 4.20.0. That's right.
  Summary:
  Reviewers: kevin, zacleids, bigly
  Subscribers: ben
diff: {
  "name": "bitgo",
  - "version": "4.19.0",
  + "version": "4.20.0",
  "description": "BitGo Javascript SDK",
  "main": "./src/index.js",
  "keywords": [
  "http-proxy": "1.11.1",
  "lodash": "4.13.1",
  "minimist": "0.2.0",
  - "moment": "~2.18.1",
  + "moment": "~2.20.1",
  "morgan": "1.9.0",
  "prova-lib": "0.2.9",
  "ripple-lib": "~0.17.7",
  