v0.2.1

• Improve error page
• Tutorial dependency validation in tutorial config. See an example below

{
  "config": {
    "dependencies": [
      {
        "name": "node", // command line process to run
        "version": "^10", // see node-semver for options
        "message": "An optional message to display if the validation fails"
      },
      {
        "name": "npm",
        "version": ">5"
      }
    ]
  }
}