use quick way to fix the close modal animation issue.

see:
valor-software#6565

Author: andy840119

src/modal/bs-modal.service.ts

@@ -141,7 +141,9 @@ export class BsModalService {
       .provide({ provide: BsModalRef, useValue: bsModalRef })
       .attach(ModalContainerComponent)
       .to('body');
-    bsModalRef.hide = () => this.hide(bsModalRef.id);
+    // use quick way to fix the animate issue for now
+    // see: https://github.com/valor-software/ngx-bootstrap/pull/6565
+    bsModalRef.hide = () => modalContainerRef.instance?.hide();
     bsModalRef.setClass = (newClass: string) => {
       if (modalContainerRef.instance) {
         modalContainerRef.instance.config.class = newClass;