message: Update API-reference.md
  data type for samplingPercentage was boolean, changing to number since it's a percentage
diff: @@ -269,7 +269,7 @@ interface IConfig {
  // Controls what percentage of events will be sent
  // Default 100.
  - samplingPercentage: boolean;
  + samplingPercentage: number;
  // Default 10s
  diagnosticLogInterval: number;
  