message: chore(modal): expose global config interface
diff: @@ -2,7 +2,7 @@ export { BsModalRef } from './bs-modal-ref.service';
  export { ModalBackdropOptions } from './modal-backdrop.options';
  export { ModalContainerComponent } from './modal-container.component';
  export { ModalBackdropComponent } from './modal-backdrop.component';
  -export { ModalOptions } from './modal-options.class';
  +export { ModalOptions, MODAL_CONFIG_DEFAULT_OVERRIDE } from './modal-options.class';
  export { ModalDirective } from './modal.directive';
  export { ModalModule } from './modal.module';
  export { BsModalService } from './bs-modal.service';
  