message: package: bump merkle-lib and dev dependencies
diff: "create-hash": "^1.1.0",
  "create-hmac": "^1.1.3",
  "ecurve": "^1.0.0",
  - "merkle-lib": "^1.0.0",
  + "merkle-lib": "^2.0.10",
  "pushdata-bitcoin": "^1.0.1",
  "randombytes": "^2.0.1",
  "typeforce": "^1.8.7",
  "coinselect": "^3.1.1",
  "minimaldata": "^1.0.2",
  "mocha": "^3.1.0",
  - "nyc": "^8.1.0",
  + "nyc": "^10.2.0",
  "proxyquire": "^1.4.0",
  "sinon": "^1.12.2",
  "standard": "^9.0.2"
  