message: fix scrypt-shim depency of web3
diff: "stellar-sdk": "^0.11.0",
  "styled-components": "^4.4.0",
  "valuelink": "^1.6.2",
  - "web3": "github:ethereum/web3.js#1.x"
  + "web3": "github:ethereum/web3.js#1.x",
  + "scrypt-shim": "github:web3-js/scrypt-shim"
  }
  }
  