message: chore(DateRange): null portion of interface is deprecated
  use undefined instead
  ISSUES CLOSED:
diff: @@ -25,22 +25,17 @@ import { BehaviorSubject } from 'rxjs';
  /**
  * Define the structure of the date range object used by {@link TsDateRangeComponent}
  - *
  - * TODO: In the process of deprecating the `null` portion of this interface. It should be using
  - * `undefined` instead.
  - *
  - * Deprecation target: 10.0.0
  */
  export interface TsDateRange {
  /**
  * The start date of the range
  */
  - start: Date | undefined | null;
  + start: Date | undefined;
  /**
  * The end date of the range
  */
  - end: Date | undefined | null;
  + end: Date | undefined;
  }
  