Update npm scripts

[notmessenger]

  "scripts": {
    "build": "node_modules/.bin/ember build",
    "docs": "node_modules/.bin/ember ember-cli-jsdoc",
    "lint": "node_modules/.bin/sl-eslint",
    "lint-all": "node_modules/.bin/sl-eslint addon app tests",
    "start": "node_modules/.bin/ember server",
    "test": "npm run docs && npm run lint-all && node_modules/.bin/ember test"
  }