feat(b-dropdown-item): ✨ Bind class attribute to the root

Author: imanmalekian31

packages/bootstrap-vue-3/src/components/BDropdown/BDropdownItem.vue

@@ -1,5 +1,5 @@
 <template>
-  <li role="presentation">
+  <li role="presentation" :class="$attrs.class">
     <component
       :is="tag"
       class="dropdown-item"

packages/bootstrap-vue-3/src/components/BDropdown/BDropdownItemButton.vue

@@ -1,5 +1,5 @@
 <template>
-  <li role="presentation">
+  <li role="presentation" :class="$attrs.class">
     <!-- Should click be click.prevent ? -->
     <button
       role="menu"