message: chore(sdk-coin-avaxp): use bitgo bitcoinjslib
diff: "@bitgo/sdk-core": "^1.0.1",
  "@bitgo/statics": "^6.17.0",
  "avalanche": "3.13.3",
  + "bech32": "2.0.0",
  "bignumber.js": "^9.0.0",
  "bip32": "^2.0.6",
  - "secp256k1": "^4.0.2",
  - "bech32": "2.0.0"
  + "bitcoinjs-lib": "npm:@bitgo/bitcoinjs-lib@6.1.0-rc.3",
  + "secp256k1": "^4.0.2"
  },
  "devDependencies": {
  "@types/node": "^11.11.4"
  