message: Fix didYouMean type for TS 3.8.1-rc
diff: @@ -28,7 +28,7 @@ export interface InvalidFieldTypeError {
  export interface InvalidFieldNameError {
  type: 'invalidFieldName'
  modelName: string
  - didYouMean?: string
  + didYouMean?: string | null
  providedName: string
  isInclude?: boolean
  isIncludeScalar?: boolean
  