Adding package.json basic for generator

package.json

{
  "name": "<%= projectNameSlugged %>",
  "version": "0.0.1",
  "description": "",
  "main": "index.js",
  "directories": {
    "test": "test"
  },
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "MIT",
  "devDependencies": {
    "del": "^2.2.1",
    "fs": "^0.0.1-security",
    "gulp": "gulpjs/gulp#4.0",
    "gulp-watch": "^4.3.10",
    "map-stream": "^0.0.6",
    "node-sass": "^3.10.1",
    "path": "^0.12.7",
    "gulp-if": "^2.0.1",
    "gulp-imagemin": "^3.0.1",
    "merge-stream": "^1.0.0",
    "plylog": "^0.4.0",
    "polymer-build": "^0.4.0",
    "babel-preset-es2015": "^6.18.0",
    "css-slam": "^1.1.0",
    "gulp-babel": "^6.1.2",
    "gulp-html-minifier": "^0.1.8",
    "gulp-uglify": "^2.0.0",
    "gulp-util": "^3.0.7"
  }
}