message: docs(team): add jan-niklas to core team
diff: "picture": "https://avatars1.githubusercontent.com/u/516168",
  "twitter": "https://twitter.com/jasonaden1",
  "group": "Contributors"
  + },
  + "jan-niklas": {
  + "name": "Jan-Niklas Wortmann",
  + "role": "Developer",
  + "github": "https://github.com/JWO719",
  + "picture": "https://avatars3.githubusercontent.com/u/6104311",
  + "twitter": "https://twitter.com/niklas_wortmann",
  + "group": "Core Team"
  }
  }
  