Remove extraneous dependency
"bn.js": "^4.11.8",
"bitcoin-spv": "git+https://github.com/summa-tx/bitcoin-spv.git#v1.1.0-high-err",
"chai": "^4.2.0",
- "core-js": "3",
"create-hash": "^1.2.0",
"openzeppelin-solidity": "2.3.0",
"solc": "^0.5.10"
