make Portal packed in bootstrap-vue availabel to users

[scil]

just a little patch used by patch-package . if you want to use Portal，no need to install the second piece of code.

diff --git a/node_modules/bootstrap-vue/dist/bootstrap-vue.js b/node_modules/bootstrap-vue/dist/bootstrap-vue.js
index 3255ed4..8112f13 100644
--- a/node_modules/bootstrap-vue/dist/bootstrap-vue.js
+++ b/node_modules/bootstrap-vue/dist/bootstrap-vue.js
@@ -30166,6 +30166,18 @@
 
   // Main entry point for the browser build
   
+    if ( // @ts-ignore
+  typeof window !== 'undefined' && window.Vue && window.Vue === Vue) {
+    window.Vue.use({
+      install: function install(Vue$$1) {
+        var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+        Vue$$1.component(options.portalName || 'Portal', Portal);
+        Vue$$1.component(options.portalTargetName || 'PortalTarget', PortalTarget);
+        Vue$$1.component(options.MountingPortalName || 'MountingPortal', MountingPortal);
+      }
+    });
+  }
+
   vueUse(BootstrapVue);
 
   return BootstrapVue;