message: Add Ryan Timmons to CREDITS
diff: "kevin.albertson@mongodb.com"
  ],
  "description": "Ongoing development/maintenance."
  + },
  + {
  + "name": "Ryan Timmons",
  + "email": [
  + "ryan.timmons@mongodb.com"
  + ],
  + "description": "Change streams, example code for complex aggregations."
  }
  -
  ]
  }
  