My Grunt Setup - no ruby required version

Gruntfile.js

// inspired by https://gist.github.com/jshawl/6225945
// Thanks @jshawl!

// now using grunt-sass to avoid Ruby dependency

module.exports = function(grunt) {
	grunt.initConfig({
		pkg: grunt.file.readJSON('package.json'),
		sass: { // sass tasks
			dist: {
				files: {
					'dist/css/main.min.css': 'css/main.scss' // this is our main scss file
				}
			},
			options: {
				compass: true,
				style: 'compressed',
				sourceMap: true
			}
		},
		autoprefixer:{
			dist:{
				options: {
					map: true
				},
				files:{
					'dist/css/main.min.css':'dist/css/main.min.css'
				}
			}
		},
		uglify: {
			dist: {
				files:  [{
					expand: true,
					src: '**/*.js',
					dest: 'dist/js',
					cwd: 'js',
					rename: function(dest, src) { return dest + '/' + src.replace('.js', '.min.js'); },
				}],
			}
		},
		watch: {
			css: {
				files: ['css/*.scss', 'js/*.js'],
				tasks: ['sass', 'autoprefixer', 'uglify']
			}
		}
	});
	grunt.loadNpmTasks('grunt-sass');
	grunt.loadNpmTasks('grunt-contrib-watch');
	grunt.loadNpmTasks('grunt-contrib-uglify');
	grunt.loadNpmTasks('grunt-autoprefixer');;
	grunt.registerTask('default',['sass', 'autoprefixer', 'uglify', 'watch']);
}

package.json

{
  "name": "squarecandy-EXAMPLE",
  "version": "1.0.0",
  "description": "Square Candy's Example Setup",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/squarecandy/squarecandy-EXAMPLE.git"
  },
  "author": "Square Candy Design / Peter Wise",
  "license": "GPL-3.0",
  "bugs": {
    "url": "https://github.com/squarecandy/squarecandy-EXAMPLE/issues"
  },
  "homepage": "https://github.com/squarecandy/squarecandy-EXAMPLE#readme",
  "devDependencies": {
    "grunt": "^1.0.1",
    "grunt-autoprefixer": "^3.0.4",
    "grunt-contrib-uglify": "^3.0.0",
    "grunt-contrib-watch": "^1.0.0",
    "grunt-sass": "^2.1.0",
    "node-sass": "^4.9.0"
  }
}