message: chore: fix comment grammar mistake
diff: @@ -27,10 +27,10 @@ export const observerState = {
  }
  /**
  - * Observer class that are attached to each observed
  - * object. Once attached, the observer converts target
  + * Observer class that is attached to each observed
  + * object. Once attached, the observer converts the target
  * object's property keys into getter/setters that
  - * collect dependencies and dispatches updates.
  + * collect dependencies and dispatch updates.
  */
  export class Observer {
  value: any;
  