message: Bump minimal version of babel-plugin-istanbul
diff: "main": "build/index.js",
  "dependencies": {
  "babel-core": "^6.0.0",
  - "babel-plugin-istanbul": "^3.0.0",
  + "babel-plugin-istanbul": "^3.1.2",
  "babel-preset-jest": "^18.0.0"
  }
  }
  