message: fix the root entry for nodejs binding
diff: "name": "flv-node",
  "version": "0.1.0",
  "description": "Fluvio Nodejs binding",
  - "main": "lib/index.js",
  + "main": "dylib/index.node",
  "author": "fluvio.i",
  "license": "ISC",
  "dependencies": {},
  