message: style(constants): add tsdoc deprecate to backwards-compat Value
diff: @@ -59,6 +59,7 @@ export enum PropType {
  }
  // For Backwards-compatability
  +/** @deprecated This was renamed to "PropType" and will be removed in 10.0 */
  export const WhatIsIt = PropType;
  /** Severity levels for soft-warnings */
  